The Canadian government would like to test the hypothesis that the standard deviation for the hourly wage for men is equal to the standard deviation for the hourly wage for women.
The following data summarizes the sample statistics for hourly wages for men and women. Men WomenSample standard deviation 6.10 6.80Sample size 21 25Using = 0.05, the conclusion for this hypothesis test would be that because the test statistic is _____________________________
____.A) more than the critical value, we fail to reject the null hypothesis and conclude that the standard deviation for the hourly wage for men is equal to the standard deviation for the hourly wage for women
B) more than the critical value, we can reject the null hypothesis and conclude that the standard deviation for the hourly wage for men is not equal to the standard deviation for the hourly wage for women
C) less than the critical value, we reject the null hypothesis and conclude that the standard deviation for the hourly wage for men is not equal to the standard deviation for the hourly wage for women
D) less than the critical value, we fail to reject the null hypothesis and cannot conclude that the standard deviation for the hourly wage for men is not equal to the standard deviation for the hourly wage for women
Q. 2Entertainment Software Association would like to test if the median age of gamers (those that routinely play video games) is more than 30 years old. The following table summarizes the ages of a random sample of gamers.
Age Number of GamersBelow 30 12Equal to 30 4More than 30 30The appropriate nonparametric procedure for this analysis is the _________________ test.A) Wilcoxon signed-rank
B) Kruskal-Wallis
C) Wilcoxon rank-sum
D) sign
Q. 3The following data represent the number of complaints per month that customer service received at a large retailer over the last 15 months.
Month Complaints Month Complaints
1 10 9 9
2 7 10 5
3 12 11 8
4 10 12 6
5 8 13 7
6 11 14 3
7 9 15 5
8 7
The residual for Month 6 is ________.
A) -2.6
B) -0.8
C) 2.4
D) 5.0
Q. 4Verizon Wireless would like to estimate the proportion of households that use cell phones for their phone service without a land line. A random sample of 150 households was selected and 48 relied strictly on cell phones for their service.
The margin of error for a 90 confidence interval for the proportion based on this sample is ________.A) 0.0333
B) 0.0475
C) 0.0561
D) 0.0627
Q. 5When the population slope is equal to zero, there is a relationship between the dependent and independent variables.
Indicate whether the statement is true or false
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