A car manufacturer has two production plants in different cities. Every day, plant A produces 120 of a certain
type of car, while plant B produces 80 of those cars. On average, all of these cars have a paint thickness of
0.04 mm with a standard deviation of 0.003 mm.
Every day, quality control experts take separate random samples of 10 cars from each plant and calculate the
mean paint thickness for each sample. They then look at the difference between those sample means.
Consider the formula:
031-32 =
02
+
ni 12
Why is it not appropriate to use this formula for the standard deviation of TA
IB?

Answers

Answer 1

Answer: We cannot assume independence for the cars sampled from plant B.

Step-by-step explanation: Khan Academy “With a sample size of 10 cars, we need at least 100 cars in the population to assume independence based on the 10% condition, but there are only 80 cars made each day at plant B.”

Answer 2

Answer: We cannot assume independence of the cars sampled from plant B.

Step-by-step explanation:


Related Questions

Nathaniel is using the quadratic formula to solve 0 = x2 + 5x - 6. His steps are shown below.
What are the solutions to the attached equation?

Answers

Answer:

x = -6, 1

Step-by-step explanation:

x=[tex]\frac{-5+\sqrt{49} }{2}[/tex] or x= [tex]\frac{-5-\sqrt{49} }{2}[/tex]

x=[tex]\frac{-5+7}{2}[/tex] or x=[tex]\frac{-5-7}{2}[/tex]

x=2/2 or x=-12/2

x = 1, -6

howdy!!

yr answer is B. x = -6, 1

goodluck on edge!! ^_^

Please look at the attached picture to answer the following question. Statement # ? is incorrect. Correct the statement:​

Answers

No oblo englsh 什麼事是l 另.荻邸

( PLEASE HELP )Use the table to write a proportion .

Answers

8/6 and then m/16 is the correct answer

In 2010, the population of a city was 25,000. The
population increased by 20% in each of the next three
years. If this rate of increase continues, what will be the
population of the city in 2015?

Answers

Answer:

43,200

Step-by-step explanation:

25,000x .20=5,000

30,000 x .20=6,000

36,000x.20=7,200

43,200x.20=8,640

51,840x.20=10,368

CONVERT THE PERCENTAGES FRACTION 130%​

Answers

Answer:

13/10

Step-by-step explanation:

Its 13/10...

please give brainliest

Answer:

13/10

Step-by-step explanation:

Which answer is correct? If someone is good at math, plz help asap. I Will give out Brainlist to whoever helps me.

Answers

Answer:

picture is upside down

Almost all employees working for financial companies in New York City receive large bonuses at the end of the year. A sample of 62 employees selected from financial companies in New York City showed that they received an average bonus of $47,000 last year with a standard deviation of $15,000. Construct a 90% confidence interval for the average bonus that all employees working for financial companies in New York City received last year.

Answers

Answer:

The 90% confidence interval for the average bonus that all employees working for financial companies in New York City received last year is between $43,819 and $50,181

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

T interval

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 62 - 1 = 61

90% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 61 degrees of freedom(y-axis) and a confidence level of [tex]1 - \frac{1 - 0.9}{2} = 0.95[/tex]. So we have T = 1.67

The margin of error is:

[tex]M = T\frac{s}{\sqrt{n}} = 1.67\frac{15000}{\sqrt{62}} = 3181[/tex]

In which s is the standard deviation of the sample and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 47000 - 3181 = $43,819

The upper end of the interval is the sample mean added to M. So it is 47000 + 3181 = $50,181

The 90% confidence interval for the average bonus that all employees working for financial companies in New York City received last year is between $43,819 and $50,181

hi, I need to send you a screenshot​

Answers

Whyyy notttt I guessss

find all solutions (x,y) of the given system, where x and y are real numbers.
xy=8
y=-x^2

Answers

Answer:  (x, y) = (-2, -4)

Work Shown:

xy = 8

x(-x^2) = 8

-x^3 = 8

x^3 = -8

x = cube root of -8

x = -2

y = -x^2

y = -(-2)^2

y = -4

You can use a graphing tool like Desmos or GeoGebra to plot the two curves. Notice they intersect at (-2,-4) to confirm the answer. See the diagram below.

The square of a whole number is between 400 and 500. The whole number must be between:

Answers

Answer: 20-23

Step-by-step explanation: 200^2 is 400 so the number must be greater and 23^2 is greater than 500 so it must be lass than 23.

Pls help!

Which figure is a prism?

Answers

Answer:

the first red one, it's a triangular prism

Step-by-step explanation:

the second one is a triangular pyramid

the rest (third and fourth one) are square pyramids

Answer:

Its the first one

Step-by-step explanation:

Because a prism is a three-dimensional shape with identical ends, called bases, and flat sides called faces. These identical slices of a prism are called cross sections.

         mark brainliest please.

⚠️HELP⚠️

If <6≈<10and <5≈<7, which describes all the lines that must be parallel?

o Only lines r and s must be parallel.
o Only lines t and umust be parallel.
Lines r and s and lines t and u must be parallel.
O Neither lines r and s nor lines t and u must be parallel

Answers

From the image we can see that; Lines r and s and lines t and u must be parallel.

What are parallel lines?

The term parallel lines refers to those lines that can not meet. We know parallel lines by the arrows that show us where they are pointing to.

Thus, from the image we can see that; Lines r and s and lines t and u must be parallel.

Learn more about parallel lines:https://brainly.com/question/16701300

#SPJ1

what is the measure of angle xyz?

Answers

Answer:

The answer is B. 93

Step-by-step explanation:

186/2 is 93

Answer:

welp now i can add my answer although the other dude got it before me so yea other person is right

Step-by-step explanation:

On which day of the month were you born?

a Categorical
or
b Numerical​

Answers

Answer:

a (typing more bc of limit lolol)

Verify the identity.
sin x/1-cos x = csc x + cot x​

Answers

Answer:

See below for proof

Step-by-step explanation:

[tex]\displaystyle \frac{\sin x}{1-\cos x}=\frac{\sin x(1+\cos x)}{(1-\cos x)(1+\cos x)}\\\\\frac{\sin x}{1-\cos x}=\frac{\sin x(1+\cos x)}{1-\cos^2 x}\\\\\frac{\sin x}{1-\cos x}=\frac{\sin x(1+\cos x)}{\sin^2 x}\\\\\frac{\sin x}{1-\cos x}=\frac{1+\cos x}{\sin x}\\\\\frac{\sin x}{1-\cos x}=\frac{1}{\sin x}+\frac{\cos x}{\sin x}\\\\\frac{\sin x}{1-\cos x}=\csc x+\cot x[/tex]

The balance in Susan's checking account was $245.35. After the bank deposited interest into the account, her balance went to $248.02. How much interest did the bank pay Susan

Answers

Answer:

I think 2.67

Step-by-step explanation:

A report summarized a survey of 2305 working adults (representative sample of all working adults). The report indicates that 484 of the working adults surveyed said they were very concerned that their job will be automated, outsourced, or otherwise made obsolete in the next five years. Obtain a point estimate for the population proportion of all working adults who very concerned that their job will be automated, outsourced, or otherwise made obsolete in the next five years. Select the correct answer, including appropriate notation.

Answers

Answer:

The point estimate for the population proportion of all working adults who very concerned that their job will be automated, outsourced, or otherwise made obsolete in the next five years is 0.21.

Step-by-step explanation:

Point estimate of a proportion:

The point estimate of a proportion, from a sample, is the sample proportion.

In this question:

2305 working adults, 484 said they were very concerned that their job will be automated, outsourced, or otherwise made obsolete in the next five years. This means that:

[tex]p = \frac{484}{2305} = 0.21[/tex]

The point estimate for the population proportion of all working adults who very concerned that their job will be automated, outsourced, or otherwise made obsolete in the next five years is 0.21.

A survey is being conducted to decide on how much time people spend watching sports on television. Tell whether the given sample is biased or unbiased. Explain your answers. (NOT A MULTIPLE CHOICE)

1. Every fifth person who enters Little Casesars Arena for a Red Wings game

2. Every tenth name in the phone.

Answers

Sampling bias occurs when some members of a population are systematically more likely to be selected in a sample than others. From this definition,

For sample 1, Every fifth person who enters Little Casesars Arena for a Red Wings game. This is not biased because no person is more likely to be selected than another

For sample 2, Every tenth name in the phone. This is also not biased

because no person is more likely to be selected than another

please help me I dont understand this question ​

Answers

Answer:

sinx=opp/hyp=6/10=0.6

x=sin-(0.6)=37°

3) Find the area of the composite figure.
8 cm
2 cm
a. 44 cm
6 cm
5 cm
b. 50 cm?
5 cm
2 cm
c. 36 cm
8 cm
d. 22 cm

Answers

Answer:

8

Step-by-step explanation:

I love these


Your answer would be (C) 36


Just added up all of the numbers

Marie found that 4 bags of leaves weigh 6 pounds and 8 bags of leaves weigh 12 pounds. She made a graph to help her find the weight of other numbers of bags. On a coordinate plane, a line is drawn through points (4, 6) and (8, 12). Which ordered pair follows the pattern in the graph? (2, 4) (3, 4) (6, 8) (6, 9)

Answers

The ordered pair (6,9) follows the pattern in the graph.
For every 2 on the x coordinate, there is 3 for the y coordinate. (2,3) (4,6) (6,9) (8,12) and so on.

Answer:

D 6,9

Step-by-step explanation:

Give Brainliest for the correct Answer 50 points

Answers

Answer:

x-30

Step-by-step explanation:

Answer: 5(x-2)=40     5x-10 = 40      5x=50    x=10  

Step-by-step explanation:

^

Ali has $60 to spend and would like to buy
as many calculators as possible with the
money. The calculators that she wants to
buy are $8.75 each.
How much money will she have left over
after she purchases the greatest possible
number of calculators?

Answers

Answer:

60/8.75 = 6 calculators.

6 x 8.75 = 52.5

60 - 52.5 = $7.50 left

Step-by-step explanation:

If triangle ABC is rotated 90 degrees clockwise about point c, which is the resulting image of point B?

A - (6,1)
B - (6,-1)
C - (-2, 5)
D- (-2,-3)

PLEASE HELP ME PLEASE I REALLY NEED HELP PLEASE

Answers

Never seen that before sorry it’s a little hard ur school bro

Please help!!!!! ASAP it’s a checkpoint

Answers

Answer:

Option A. x = –5 ± √133 / –6

Step-by-step explanation:

0 = –3x² + 5x + 9

From the above equation the following data were obtained:

Coefficient of x² (a) = –3

Coefficient of x (b) = 5

Constant (c) = 9

Using formula method, the solution to the equation can be obtained as follow:

x = –b ± √(b² – 4ac) / 2a

a = –3

b = 5

c = 9

x = –5 ± √(5² – 4 × –3 × 9) / 2 × –3

x = –5 ± √(25 + 108) / –6

x = –5 ± √133 / –6

Thus, option A gives the correct answer to the question.

(08.01)Two lines, A and B, are represented by the following equations:
Line A: 2x + 2y = 8
Line B: x + y = 3
Which statement is true about the solution to the set of equations?
It is (1, 2).
There are infinitely many solutions.
O It is (2, 2).
There is no solution.

Answers

Answer:

there is no solution

Step-by-step explanation:

both of the lines have the same slope making them parallel so there is no solution

Raquel's Brownies
Raquel has 4 brownies. She wants to give an equal share to each
of her friends. How would Raquel share these brownies equally among herself
and 8 friends? How much of the brownies will each person get? Use words,
pictures, and an equation to explain your thinking.
Estimate

Answers

Answer:

each person will get half of a brownie

Step-by-step explanation:

4 divided by 8 is 1/2 so you'll have to split each brownie in half and give each person half

Jim has 28 mangoes he gave Tom 8 how many does Jim has

Answers

Answer: 20 mangoes.

Step-by-step explanation: This is a simple subtraction problem. If you take away 8 from 28, you'll have 20.

28 - 8 = 20

what is the cube root of 343/8?

Answers

Answer:

970.150503788

Step-by-step explanation:

the answer is 0.875 soo use square root on both of them

VERY EASY, WILL GIVE 50 POINTS FOR CORRECT ANSWER ASAP AND WILL GIVE BRAINLIEST.

Answers

Answer:

ABCD is reflected over both axes

Step-by-step explanation:

I got it right on my quiz

Other Questions
The Fresh Connection is considering options for distribution of juice products into additional regions. They are comparing two possible locations for setting up distribution centers. The costs associated with the two locations are provided in the table below. At what level of demand would they be indifferent between the two locations?All other information would be the same for both locations. Round your final answer to two (2) decimal places.Location 1Location 2Annual Fixed Overhead$119,068$203,018Annual Labor Cost$235,000$309,357Per Unit Shipping Cost$8.58$1.26Per Unit Cost of Labor$6.48$1.56 Which of the following does NOT encourage centralizeddecision-making in subsidiaries operations?Select one:a.Much international experienceb.Strong volume-to-unit-cost ratioc.Low product a process switch may occur when the system encounters an interrupt condition, such as that generated by a: a. trap b. memory fault c. supervisor call d. all of the above In a photoelectric effect experiment, the intensity of the light is increased while the frequency is held constant.As a result,(a) There are more photoelectrons.(b) The photoelectrons are faster.(c) Both above-mentioned effects.(d) Neither first effect nor second one. Which one of the following aspects of an audit would you not expect to see when examining the logging and monitoring for web applications?A.Review the log retention periodB.Logging of non-critical events prioritized over key eventsC.Review if sensitive or regulated log data is transferred to centralized log storageD.Prioritizing monitoring on most critical systemsWhich one of the following aspects of an audit would you not expect to see when examining the logging and monitoring for web applications?A.Review the log retention periodB.Logging of non-critical events prioritized over key eventsC.Review if sensitive or regulated log data is transferred to centralized log storageD.Prioritizing monitoring on most critical systems Question 2 (1 point) A good way to deal with adverse selection faced by an insurance company would not be to a) require policy holders to pay a deductible b) insure groups of individuals (such as all An angle's initial ray points in the 3-o'clock direction and its terminal ray rotates CCW. Let represent the angle's varying measure (in radians).a. If =0.2, what is the slope of the terminal ray?b. If =1.75, what is the slope of the terminal ray?c. Write an expression (in terms of ) that represents the varying slope of the terminal ray. A forecast using the ratio 'Days Sales Outstanding' (DSO) is applying a business relationship.True or False? 8. Without dividing the numerator by the denominator, how do you know if 14/28 is a terminating or a non-terminating decimal? why do hydrophobic soils promote debris flows and flooding in regions recently burned by wildfires? HOW TO CALCULATE THE TAXESFERGUSON JAMES HAS A TOTAL EARNINGS OF $ 2,250. and he ismarried with 5 withholdings, how much will be the OASDI, HI,FIT,SIT, SUTA, CIT? Mushroom Inc. has a net profit margin of 12%, an equity multiplier of 2, sales of RM575,000 and a ROE of 14.5%. What is Mushroom's total asset turnover? Company X had sales of RM120 and its cost of goods sold is 25% of sales. In addition, X had total other operating expenses of RM50. The company also incurs a 10 percent interest expense on its RM200 debt if the company's tax rate is 40% what is X's net income? With this weeks faith integration, we will continue in last weeks Kaizen theme. Let's narrow this down just slightly and consider how we might apply the concept (change for good) to our1. Personal life.2. Society/Culture around us.In other words, what can I do in my life to affect change in these areas? 9. Show the function f(2)=1+2i + 2 Re(2) is differentiable or not differentiable at any points. 2. You should always know what the null and alternative hypotheses are. A. What are the null and alternative hypotheses for the t-test about a coefficient? B. What are the null and alternative hypothe Suppose there are only two stocks in the entire market, Stock A and Stock B. Stock A has an expected return of 8% and a standard deviation, OA, of 15%. Stock B has an expected return of 14% and a standard deviation, og of 20%. Their market capitalizations are both exactly the same at $1,000,000. The correlation between Stock A and Stock B, p, is 0.3. The risk free rate, rf, is 4.5%. a) (10 points) If you were only able to hold either the market portfolio or Stock A in isolation, and held no other assets, which would you choose and why? b) (10 points) Show that the CAPM does not hold in this example given the numbers above. Recall that for the CAPM to hold implies that the market is equal to the tangent portfolio. In Parts A and B you found two different expressions to describe the allowed electron velocities v. Equate these two values (eliminating v) and solve for the allowable radii r in the Bohr model. The two equations are:v =e sqrt(4phie0mr) and v = nh/2mrphi according to freud's theories, the functions as an internal monitor that helps balance the impulses stimulated by biogenic needs and the constraints applied by the sociocultural setting. question 3 options: a) id b) self-image c) superego d) super-id e) ego Which of the following recommendations promote a healthy eating pattern for pregnant women? Select all that apply.Eat a variety of nutrient-dense foods and beverages among the basic food groups.Include an adequate amount of vegetables, fruits, whole grains, and milk and milk products.Follow food safety guidelines to reduce the risk of food-borne illness.Avoid excessive intake of cholesterol, added sugars, and salt. Write inequalities that describe the following statements. (But don't solve them!) a) The sum of two natural numbers is less than 22. b) A computer company manufacturers tablets and personal computers. The plant equipment limits the total number of both that can manufactured in one day. No more than 180 can be produced in one day. c) A farmer grows tomatoes and potatoes. At most, $9,000 can be spent on seeding costs and it costs $100/acre to plant tomatoes and $200/acre to plant potatoes. d) Wei owns a pet store and wishes to buy at least 8 cats and 10 dogs from a breeder. Cats cost $35 each and dogs cost $150 dollars each. Wei does not want to spend more than $1,700 in total.