Question

Help a guy/girl/non-binary out? Please?

Suppose 288 electricians took a certification test that is worth 140 points. The five-number summary for the scores is shown here.
min. value = 68
Q1 = 110
median = 125
Q3 = 130
max. value = 138

About how many electricians had a score of 110 or less? A: 72 B: 130 C: 144 D: 216

Answer 1

72

Explanation:

For Q 1 : 25 % of the scores are below this value. The area under the bell-shaped curve of the normal distribution is 0.25. And since we have 288 electricians that took a certification test:

0.25 * 288 = 72.