Question

Use the Grouped Distribution method for the following exercise (see Self-Test 2-4 for detailed instructions), rounding each answer to the nearest whole number. Using the frequency distribution below (scores on a statistics exam taken by 80 students), determine:ion 1 of the preliminary test (scores on a statistics exam taken by 80 students), determine:

68 84 75 82 68 90 62 88 76 93 73 79 88 73 60 93 71 59 85 75

61 65 75 87 74 62 95 78 63 72 66 96 79 65 74 77 95 85 78 86

71 78 78 62 80 67 69 60 76 62 71 75 82 89 67 73 73 74 79 65

81 76 72 75 61 97 57 63 68 83 76 75 53 85 94 75 78 88 77 60

a. the 8^th decile score
  

b. the 3rd quartile score
  

c. the 9^th decile score
  

d. the 55^th percentile score

Answer 1

We have to find decile, quartile, percentile.

By using excel we can solve this question.

a)

The 8^th decile score = 85

( Using excel =PERCENTILE(Select data, 0.8))

b)

The 3rd quartile score = 82

( Using excel =QUARTILE(Select data,3))

c)

The 9^th decile score = 89.5

(Using excel =PERCENTILE(Select data, 0.9))

d)

The 55^th percentile score = 76

(Using excel =PERCENTILE(Select data, 0.55))