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2. The frequency distribution below shows the distribution for job placement exam scores for a random

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2. The frequency distribution below shows the distribution for job placement exam scores for a random
sample of 1000 adults. (Show all work. Just the answer, without supporting work, will receive no credit.)

Scores Frequency Relative Frequency

50 – 69 24

70 – 89

90 – 109 453

110 – 129 0.25

130 – 149 25

Total 1000

(a) Complete the frequency table with frequency and relative frequency. Express the relative

frequency to three decimal places.

(b) What percentage of the adults in this sample has a score of at least 110?

(c) Does this distribution have positive skew or negative skew? Why or why not?

 
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