Assignment 10 – STAT 110 Fall 2013 (49 points)

1 – WSU Student Survey Data: Facebook Friends and Gender

Research Question: I believe that WSU female students will have more Facebook friends on average than WSU male students. Is there evidence to support my hypothesis?

Use the results of the WSU student survey to test my research hypothesis.

a)The variables you need to use in your analysis are Gender and Facebook Friends. Classify each variable according to its data type and identify which variable is the response (Y) and which is the predictor (X). (3 pts.)

b)Set up the null and alternative hypothesis for answering the research question. (3pts.)

Ho:

Ha:

c)Conduct an appropriate analysis in JMP and copy and paste the results below. Comment on the assumptions required for the analysis you used and whether they are met. (3 pts.)

d)Use your results to answer the research question. State your conclusion in words.

(3 pts.)

e) Interpret the 95% CI for the difference in the means. (2 pts.)

2 – WSU Student Survey Data: Alcohol Consumption and Gender

Research Question: I believe that WSU male students will have more alcoholic drinks on average than WSU female students on night in which they do consume alcohol. Is there evidence to support my hypothesis?

Use the results of the WSU student survey to test my research hypothesis.

a)The variables you need to use in your analysis are Gender and Number of Alcohol Beverages Per Night. Classify each variable according to its data type and identify which variable is the response and which is the predictor. (3 pts.)

b)Set up the null and alternative hypothesis for answering the research question. (3pts.)

Ho:

Ha:

c)Conduct an appropriate analysis in JMP and copy and paste the results below. Comment on the assumptions required for the analysis you used and whether they are met. (3 pts.)

d)Use your results to answer the research question. State your conclusion in words.

(3 pts.)

e) Interpret the 95% CI for the difference in the means. (3 pts.)

3 – WSU Student Survey Data: GPA and Time Spent Studying Per Day

My research questions:

1)I believe that female WSU students have higher mean GPA’s than male WSU students. Do the survey results support that claim?

2)I also believe that female WSU students study more on average than male WSU students, which might be a contributing factor to my first belief. Do the survey results support that claim?

a)To answer these research questions fill in the table below. (10 pts.)

Factor / Sample
Size (ni) / Sample
Mean
( / Sample
SD
/ Appropriate
p- value / CI for Difference in
Population Means (
(LCL, UCL)
GPA
Female
Male
Time Spent Studying
Female
Male

Summarize the results for each comparison below:

b) GPA comparison(5 pts.)

c) Time Spent Studying comparison (5 pts.)

1