Jeff Kobak Sam Dejoy
Ross Whitworth

 

2008 AP Statistics
 

Descriptive Statistics: Texts/Minutes for females

Variable N N* Mean SE Mean StDev Minimum Q1 Median Q3

Texts/Minutes 45 4 7.87 3.40 22.84 0.00 0.37 1.56 5.00

Variable Maximum

Texts/Minutes 150.00

Descriptive Statistics: Texts/Minutes for males

Variable N N* Mean SE Mean StDev Minimum Q1 Median Q3

Texts/Minutes 44 7 5.18 1.40 9.31 0.00 0.45 2.00 5.94

Variable Maximum

Texts/Minutes 50.00

 

 

1. u1 = the ratio of minutes talked per month to texts sent and received per month for females at North Olmsted High School.

u2 = the ratio of minutes talked per month to texts sent and received per month for males at North Olmsted High School.

2.H0: u1 - u2 = 0

3. Ha: u1- u2 <> 0

4. Significance level a = .05

5.img2.gif (1322 bytes)

6.Assumptions: Subjects were randomly assigned to  the treatment groups, both sample sizes are large, so the two-sample t test is appropriate

7.

 t= .73

8.dF=58, P-Value= .469

Graphs

Raw Data