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No. & Date Asked  Question 

# 563 :: 12/19/08

A vinyl siding company claims that the mean time to install siding on a mediumsize house is at most 20 hours with a standard deviation of 3.7 hours. . . .
1sample Ztest,
1sample ttest 
# 574 :: 1/14/09

Assume you have the following data: Ho mu = 200, s = 30, n = 64, and xbar
= 218. Conduct a hypothesis test at the .05 significance level.
Assum. . .
1sample ttest,
1sample Ztest 
# 686 :: 4/18/09

A label on a container of orange juice claims that the orange juice contains an average of 2 grams of fat with standard deviation of 1.5 grams. A cons. . .
1sample Ztest 
# 705 :: 4/27/09

THIS QUESTION IS NO LONGER AVAILABLE. . .
1sample Ztest 
# 736 :: 5/28/09

A student heard that the average household watches 26.4 hours of t.v. per week, with a stand.dev. of 2.3 hours. He decided to run his own experiment . . .
1sample Ztest 
# 741 :: 6/6/09

Assume you have the following data: Ho: u = 200, S = 30, n = 64, and X = 218. Conduct a twotailed hypothesis test at the .05 significance level.. . .
1sample Ztest 
# 743 :: 6/6/09

Assume you have the following data: Ho: u = 2,450, S = 400, n = 100, and X = 2,300. Conduct a hypothesis test at the .01 significance level.
**If the. . .
1sample Ztest 
# 844 :: 3/2/10

A new weightwatching company, Weight Reducers International, advertises that those
who join will lose, on the average, 10 pounds the first two weeks. . .
1sample ttest,
1sample Ztest 
# 845 :: 3/2/10

Dole Pineapple, Inc., is concerned that the 16ounce can of sliced pineapple is being
overfilled. Assume the standard deviation of the process is .03. . .
1sample ttest,
1sample Ztest 
# 948 :: 4/29/12

It is important for airlines to know the approximate total weight of the baggage carried on each airplane. An airline researcher believes that the mea. . .
1sample Ztest 