Question

2.2 organizing & graphing quantitative data
ages number of students
15-18 2
19-22 9
23-26 4
27-30 3
31-34 10
35-38 2
based on the frequency distribution above, find the relative frequency for the class with a lower class limit of 15
give your answer as a percent, rounded to 1 place after the decimal point, if necessary. type only a number in the answer box (do not type “%” after your answer).
relative frequency = %
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Explanation:

Step1: Calculate total frequency

$2 + 9+4 + 3+10+2=30$

Step2: Find frequency of class with lower - limit 15

The frequency of the class 15 - 18 is 2.

Step3: Calculate relative frequency

Relative frequency = $\frac{2}{30}\times100\approx 6.7$

Answer:

6.7