QUESTION 1

1. Which of the following scenarios are most suitable for thechi-square test for difference in proportions?
   Hint: There are 3 correct answers.

   	a.	You want to know whether there is any difference between theaverage number of females and the average number of males whoprefer working for a boss of the opposite gender as compared to aboss of the same gender.
   	b.	You are curious to find out if there is any difference in theaverage incomes among the U.S., Canada and the U.K.
   	c.	You wonder whether there is any difference in the proportions ofsmokers between female high school students and male high schoolstudents.
   	d.	You are interested in finding out whether the proportions ofstudents who agree that NAU should increase its tuition further arethe same across freshmen, sophomores, juniors and seniors.
   	e.	You are interest in finding out whether the percentages of PCsthat break down within the first month are the same across fivedifferent manufacturers.
   	f.	You want to know whether the percentage of republicans who favora tax cut is higher than the percentage among democrats.

QUESTION 2

1. Which of the following scenarios are most suitable for thechi-square test for independence?
   Hint: There are 2 correct answers.

   	a.	You want to know if there is any connection between a person’shair color and eye color.
   	b.	You want to know whether there is any difference between theaverage number of females and the average number of males whoprefer working for a boss of the opposite gender as compared to aboss of the same gender.
   	c.	You are curious to find out if the variations of smokers are thesame across freshmen, sophomores, juniors and seniors at NAU.
   	d.	You wonder whether political party affiliation is related togender.
   	e.	You are curious to find out if there is any difference in theaverage incomes among the U.S., Canada and the U.K.
   	f.	You want to know whether median income of republicans are higherthan the median income of democrats.

QUESTION 3

1. Which of the following scenarios are most suitable for the Ztest for difference in two proportions?
   Hint: There are 2 correct answers.

   	a.	You are interested in finding out whether the proportions ofstudents who agree that NAU should increase its tuition further arethe same across freshmen, sophomores, juniors and seniors.
   	b.	You are interest in finding out whether the percentages of PCsthat break down within the first month are the same across fivedifferent manufacturers.
   	c.	You wonder whether political party affiliation is related togender.
   	d.	You want to know if there is any connection between a person’shair color and eye color.
   	e.	You wonder whether there is any difference in the proportions ofsmokers between female high school students and male high schoolstudents.
   	f.	You want to know whether the percentage of republicans who favora tax cut is higher than the percentage among democrats.
   	g.	You are curious to find out if there is any difference in theaverage incomes among the U.S., Canada and the U.K.
   	h.	You want to know whether there is any difference between theaverage number of females and the average number of males whoprefer working for a boss of the opposite gender as compared to aboss of the same gender.

QUESTION 4

1. When should the Marascuilo procedure be used?

   	a.	To find out if there is any difference in any pair of populationproportions when one fails to reject the chi-square test for twoproportions.
   	b.	To find out if there is any difference in any pair of populationproportions once the chi-square test for more than two proportionsis rejected.
   	c.	To find out if there is any difference in any pair of populationporportions when one fails to reject the chi-square test for morethan two proportions.
   	d.	To find out if there is any difference in any pair of populationproportions once the chi-square test for two proportions isrejected.

QUESTION 5

1. The computation and operation procedure of the chi-square testfor independence is exactly the same as those of which of thefollowing?
   One correct answer.

   	a.	one-way ANOVA F test
   	b.	Z test for difference in two proportions
   	c.	Tukey-Kramer procedure
   	d.	Chi-square test for difference in more than two proportions
   	e.	Marascuilo procedure
   	f.	Z test for difference in two means