A manufacturer of detergent claims that the contents of boxes sold weigh on average at least...

Question

Question

A manufacturer of detergent claims that the contents of boxes sold weigh on average at least 30 ounces. The distribution of w

math Statistics-And-Probability

Add a comment Improve this question Transcribed image text

Answer 1

Answer #1

Please don't hesitate to give a "thumbs up" for the answer in case the answer has helped you

a. Test-statistic
= (Xbar-Mu)/(Stdev/sqrt(n))
= (29.7-30)/(0.7/sqrt(25))
= -2.14

Answer: -2.14

b.

df = n-1=24

Critical value at significance level of 1% is : -2.7969 , and rounding off to -2.80 ( 2 decimal places)

Answer: -2.80

c. The decision is ?

Since our test-statistic is more than critical test-statistic then we fail to reject the null hypothesis.

Answer: B. Do not reject the null hypothesis.

Add a comment

Answer 2

Similar Homework Help Questions

Please, determine the appropriate value(s) of -Za, Za, +- Z(a/2) and round to two decimal places...

Please, determine the appropriate value(s) of -Za, Za, +- Z(a/2) and round to two decimal places as needed. A manufacturer of detergent claims that the contents of boxes sold weigh on average at least 12 ounces. The distribution of weight is known to be normal, with a standard deviation of 0.5 ounces. A random sample of 16 boxes yielded a sample mean weight of 11.23 ounces. Test at the 1% significance level the null hypothesis that the population mean weight...
THANK YOU IN ADVANCE FOR HELPING ME! i appreciate this soo much! this has helped me...

THANK YOU IN ADVANCE FOR HELPING ME! i appreciate this soo much! this has helped me a lot especially throught times like this. im so grateful for your help 1 2 3 4 (1 point) The time needed for college students to complete a certain paper-and-pencil maze follows a normal distribution with a mean of 30 seconds and a standard deviation of 2.3 seconds. You wish to see if the mean time is changed by vigorous exercise, so you have...
9. A potato chip manufacturer claims that the weights of its potato chips are normally distributed...

9. A potato chip manufacturer claims that the weights of its potato chips are normally distributed with a mean of 10 ounces per bag. The Department of Consumer Protection takes a random sample of 23 bags of potato chips from a shipment to test whether or not they really weigh 10 ounces. If the sample has mean weight of 9.85 ounces and standard deviation of 0.3 ounce, can you conclude that a bag of potato chips does not weigh 10...

A cereal company claims that mean weight of cereal boxes is at most 16.1 ounces. Suppose...

A cereal company claims that mean weight of cereal boxes is at most 16.1 ounces. Suppose that a plant manager wishes to test whether the true mean weight of cereal boxes is greater than 16.1 ounces. Suppose that for this problem the population standard deviation is 0.4 and the population distribution is normal. The manager obtain a random sample of size 25 and finds a mean of 16.3 ounces. Using p value approach test the claim of company at significance...
A process that produces bottles of shampoo, when operating correctly, produces bottles whose contents weigh on average 20 ounces

1. A process that produces bottles of shampoo, when operating correctly, produces bottles whose contents weigh on average 20 ounces. A random sample of nine bottles from a single production run yielded the following content weights (in ounces):21.4 19.7 19.7 20.6 20.8 20.1 19.7 20.3 20.9Assuming that the population distribution is normal, test at the 5% level that the process is operating correctly, i.e., the mean is 20 ounces.
Instructor-created question Question Help The local veterinarian claims pugs weigh about 20 lbs on average. You...

Instructor-created question Question Help The local veterinarian claims pugs weigh about 20 lbs on average. You think it may be less To test your hypothesis, you develop hypotheses, Hop=20 versus Hy <20, and record the weights of a simple random sample of 17 pugs. Assume the population of pug weights is known to be normally distributed Answer parts (a)(c) Click here to view the 1-Distribution Area in Right Tail. (a) If your mean sample weight is 18.4 pounds with a...

2. A manufacturer of transistors claims that its transistors will last an average of 1000 hours....

2. A manufacturer of transistors claims that its transistors will last an average of 1000 hours. To maintain this claim, 25 resistors are tested each month. What conclusions can you draw from a sample that has a mean of 1010 and a standard deviation of 60? You may assume that the distribution of the lifetime of a transistor is normal [NOTE: To receive FULL CREDIT, you must conduct a COMPLETE hypothesis test and make your conclusions using BOTH a fixed...
Data on the weights (lb) of the contents of cans of diet soda versus the contents...

Data on the weights (lb) of the contents of cans of diet soda versus the contents of cans of the regular version of the soda is summarized to the right. Assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. Complete parts (a) and (b) below. Use a 0.01 significance level for both parts. Diet Regular muμ mu 1μ1 mu 2μ2 n 3838 3838...
Data on the weights (lb) of the contents of cans of diet soda versus the contents of cans of the regular version of the soda is summarized to the right. Assume that the two samples are independent si...

Data on the weights (lb) of the contents of cans of diet soda versus the contents of cans of the regular version of the soda is summarized to the right. Assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal Complete parts (a) and (b) below. Use a 0.01 significance level for both parts. Diet Reqular μ2 26 0.81485 Ib 0.00755 lb 26 0.78439...

A construction company is suspicious that the alloy beams they are receiving at a construction site have masses that are on average lighter than what the manufacturer claims to be sending out. They a...

A construction company is suspicious that the alloy beams they are receiving at a construction site have masses that are on average lighter than what the manufacturer claims to be sending out. They asked for an audit of beam weight measurements from the manufacturer to compare with their on- site weights. The results from their comparisons are given in the table below: Alloy sample 1 34 Manufacturer's mass (kg) 165 201 192 198 155 141 150 187 161 195 193...

A manufacturer of detergent claims that the contents of boxes sold weigh on average at least...

Homework Answers

Add Answer to:
A manufacturer of detergent claims that the contents of boxes sold weigh on average at least...

Post as a guest

Earn Coins

Please, determine the appropriate value(s) of -Za, Za, +- Z(a/2) and round to two decimal places...

THANK YOU IN ADVANCE FOR HELPING ME! i appreciate this soo much! this has helped me...

9. A potato chip manufacturer claims that the weights of its potato chips are normally distributed...

A cereal company claims that mean weight of cereal boxes is at most 16.1 ounces. Suppose...

A process that produces bottles of shampoo, when operating correctly, produces bottles whose contents weigh on average 20 ounces

Instructor-created question Question Help The local veterinarian claims pugs weigh about 20 lbs on average. You...

2. A manufacturer of transistors claims that its transistors will last an average of 1000 hours....

Data on the weights (lb) of the contents of cans of diet soda versus the contents...

Data on the weights (lb) of the contents of cans of diet soda versus the contents of cans of the regular version of the soda is summarized to the right. Assume that the two samples are independent si...

A construction company is suspicious that the alloy beams they are receiving at a construction site have masses that are on average lighter than what the manufacturer claims to be sending out. They a...

A manufacturer of detergent claims that the contents of boxes sold weigh on average at least...

Homework Answers

Add Answer to: A manufacturer of detergent claims that the contents of boxes sold weigh on average at least...

Post as a guest

Earn Coins

Add Answer to:
A manufacturer of detergent claims that the contents of boxes sold weigh on average at least...