Question

# Use the Grouped Distribution method for the following exercise (see Self-Test 2-4 for detailed instructions), rounding...

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 8th decile score

b. the 3rd quartile score

c. the 9th decile score

d. the 55th percentile score

We have to find decile, quartile, percentile.

By using excel we can solve this question.

a)

The 8th decile score = 85

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

b)

The 3rd quartile score = 82

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

c)

The 9th decile score = 89.5

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

d)

The 55th percentile score = 76

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

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