Use interpolation to find the requested percentiles and percentile ranks requested for the following distribution of scores.

Question:

Use interpolation to find the requested percentiles and percentile ranks requested for the following of scores.

х f cf 14–15 3 50 100 12–13 47 94 10–11 41 82 18 8-9 33 66 6-7 10 15 30 4-5 4 10 2-3 1. 2 5.

a. What is the percentile rank for X = 5?
b. What is the percentile rank for X = 12?
c. What is the 25th percentile?
d. What is the 70th percentile?

Distribution
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