Hours spent volunteering 7 7
6 3
0 1
2 3
3 5
8 5
8 1
1 6
4 0
2 1
0 1
6 2
2 7
3 4
2 0
3 3
8 7
2 7

STEPS for hypothesis testing:

State the Hypothesis
Set the Criterion
Calculate the estimated standard error of the mean
Calculate the t-statistic for the sample
Will you reject or fail to reject the null hypothesis?
Calculate confidence interval if appropriate

Factor this polynomial completely x^2-64

Solve the system of equations y= 3/2 - 1, -x+ y =-3

Quick! a survey of 57 customers was taken at a bookstore regarding the types of books purchased. the survey found that 33 customers purchased mysteries, 25 purchased science fiction, 18 purchased romance novels, 12 purchased mysteries and science fiction, 9 purchased mysteries and romance novels, 6 purchased science fiction and romance novels, and 2 purchased all three types of books. a) how many of the customers surveyed purchased only mysteries? b) how many purchased mysteries and science fiction, but not romance novels? c) how many purchased mysteries or science fiction? d) how many purchased mysteries or science fiction, but not romance novels? e) how many purchased exactly two types of books?