Grand Mean

1. Analyze the following data using RCBD Model

Block A B  C

1 78 82 79

2 102 102 99

3 68 74 70

4 83 88 86

5 95 99 92

a. State Ho and H1

b. Calculate Grand Mean, MS(treatment), MS(error)

c. Calculate F statistic

d. Determine F critical

e. Make a decision

A professor of statistics (not Lash) suspects that his five grading assistants (GA) are giving grades to students who are performing equally. To test this professor makes Xerox copies of SIX tests and gives all six to each GA. The following grades were recorded.

GA test 1  test 2 test 3  test 4  test 5 test 6

1 68  91 77  88 88  53

2 72  94 78  90 90  57

3 69  89 77  91 91  55

4 74  93 80  91 91  54

5 65  87 78  86 86  50 

a. State Ho and H1

b. Calculate Grand Mean, MS(treatment), MS(error)

c. Calculate F statistic

d. Determine F critical

e. Make a decision