Emily finished collecting data for following data to examine the effect of the number of days of class completed on number of re testing use this graph

Person	# of Days	# of retest
1	1	4
2	3	1
3	4	2
4	6	0
5	3	2
6	4	1

1. It is hypothesized a negative relationship. What is the research hypothesis?

a) H₁: r>0

b) H₁: r 0

c) H₀: =0

d) H₁: r<0

2. Assuming a significance level of .05, what is the critical value for this test?

a) +/-.8822

b) -.8114

c) -.7293

d) -.6215

3. Should accept or reject the null hypothesis and why?

4. Interpret results. What do they tell her about # of months of treatment and # of re-arrests?

5. Calculate, report, and interpret the coefficient of determination

6. Calculate the regression equation and answer the following questions based on your calculations.

What isxy?

a) 25

b) 31

c) 10

d) 21

7. What is the slope?

8. What is the final regression equation?

9. What is the y-intercept rounded to two decimal places?

10. what is the predicted number of re-testing for someone who completed five days of class?