Question: The following table shows four rows from a frequency distribution table for a sample of n = 25 scores. Use interpolation to find the percentiles

The following table shows four rows from a frequency distribution table for a sample of n = 25 scores. Use interpolation to find the percentiles and percentile ranks requested:

X f cf c%

8 3 18 72 7 6 15 60 6 5 9 36 5 2 4 16

a. What is the percentile rank for X = 6?

b. What is the percentile rank for X = 7?

c. What is the 20th percentile?

d. What is the 66th percentile?

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