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No. & Date Asked  Question 

# 946 :: 4/29/12

The management of a mine wishes to investigate the effect of a 4day workweek on absenteeism. 2 random sample of size 40 were selected. Employees of G. . .
2sample ttest 
# 847 :: 3/5/10

Grand Strand Family Medical Center is specifically set up to treat minor medical emergencies
for visitors to the Myrtle Beach area. There are two fac. . .
2sample ttest 
# 834 :: 12/9/09

You are interested in testing the hypothesis that men have greater levels of political participation than women, so you survey 332 men and 375 women . . .
2sample ttest,
Hypothesis Test 
# 814 :: 10/4/09

in a school how is ztest used in time table ... one group that studies 7 periods a day of 45 mins each class and the other group can choose semester w. . .
2sample ztest,
2sample ttest 
# 796 :: 8/13/09

Very happy Not happy at all
Mean ideal number of children 3.32 2.07
Standard deviation . . .
2sample ttest 
# 786 :: 7/27/09

From her firm’s computer telephone log, an executive found that the mean length of 64 telephone
calls during July was 4.48 minutes with a standard de. . .
2sample ttest 
# 751 :: 6/14/09

The managers in a company’s East and West regions were rated on the basis of the company’s evaluation system. A researcher wishes to conduct a ttest . . .
2sample ttest 
# 555 :: 12/14/08

Complete the following:
a. Select a variable. Compare the mean of the variable for a sample of 30 for one group with the mean of the variable for a . . .
2sample ttest,
2proportion test,
2sample ztest,
ztest 
# 542 :: 12/9/08

A financial analyst wants to compare the turnover rates, I percent, for shares of oilrelated stocks versus other stocks, such as GE and IBM. She sele. . .
2sample ttest,
Unequal Variances 
# 526 :: 11/28/08

To test the hypothesis that students who finish an exam first get better grades, Professor Hardtack kept track of the order in which papers were hande. . .
2sample ttest,
Homogeneity of Variance,
Equal Variances,
Ftest,
Levine test 
# 416 :: 9/27/08

Twenty students randomly assigned to an experimental group receive an instructional program; 30 in a second group do not. After 6 months, both groups . . .
2sample ttest,
Hypothesis Test 
# 410 :: 9/24/08

You take a random sample of pizzas sold during a one hour period over the next week. Group 1 and Group 2 The results are shown in the table to the a. . .
2sample ttest 
# 149 :: 4/14/08

You are interested in whether men participate more than women in political activities, so you survey 632 men and 675 women and ask them how many polit. . .
2sample ttest,
tstatistic,
ttest 