14.) The number of school related extracurricular activities per student are given below:X                    p(x)

0                     0.059

1                     0.122

2                     0.163

3                     ?

4                     0.213

5                     0.128

6                     0.084

7                     0.053

Suppose that a week is randomly selected. Using the above table, find

a.) p(x=3)      b.) p(x3)      c.) p(x     d.) p(2

15. 15.) The number of hours 9 students spent studying for a test and their scores on that test are given below

Hours spent studying (x)

0,2,4,5,5,6,7,8,5

    Test Score (y)

40,51,64,69,73,93,90,95,75

Calculate the equation of the regression line and use it to predict the grade of a student that studies  (a.) 1.75 hours                      (b.) 5.5 hours