The owner of a fast-food restaurant ascertains the ages of a sample of customers

Question

The owner of a fast-food restaurant ascertains the ages of a sample of customers. From these data, the owner constructs the frequency distribution shown. For each Class Interval of the Frequency distribution, determine the class midpoint, the relative frequency, and the cumulative frequency.

What does the relative frequency tell the fast-food restaurant owner about customer ages?

0-under 5

6

5-under 10

8

10-under 15

17

15-under 20

23

20-under 25

18

25-under 30

10

30-under 35

4

0-under 5

6

5-under 10

8

10-under 15

17

15-under 20

23

20-under 25

18

25-under 30

10

30-under 35

4

Explanation / Answer

Relative frequency tell the chance or probability of customers age.

Relative frequency mid point Cumulative frequency 0-under 5 6 6/86 0.070 (0+5)/2=2.5 6 5 -under 10 8 8/86 0.093 (5+10)/2=7.5 6+8=14 10 - under 15 17 17/86 0.198 12.5 14+17=31 15-under 20 23 23/86 0.267 17.5 31+23=54 20 - under 25 18 18/86 0.209 22.5 54+18=72 25 - under 30 10 10/86 0.116 27.5 72+10=82 30 - under 35 4 4/86 0.047 32.5 82+4=86

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