Question

The data below shows the number of hours a week in average group of students spend volunteering for community service projects what is a cumulative frequency table that represents the data. 4, 5, 10, 21, 6, 2, 9, 8, 12, 15, 8, 14, 6, 4, 6, 11, 3, 2, 9, 16, 22, 23

Answer 1

7. 1.47 x 10^5mm to kilometers

Answer: 0.147

Shown answer:

8.4.7 kg to pounds

Answer:

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9.138.4oz to grams

Answer: 3923.574

Shown Answer:

10. 65.5km to miles

Answer: 40.69981

Shown answer:

11. 23.6ft to cm

Answer: 719.328

Shown answer:

12. 2.36 x 10^4 s to days

Answer: 0.273148148 days

Shown answer:

13. 13.6 L to U.S. Liquid quarts

Answer:

Shown answer:

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Answer 2

The correct option is D.

Explanation:

The given data set is

4, 5, 10, 21, 6, 2, 9, 8, 12, 15, 8, 14, 6, 4, 6, 11, 3, 2, 9, 16, 22, 23

A running total of the frequencies is called Cumulative frequency.

`Cf_n=f_1+f_2+...+f_n`

`Cf_n=Cf_(n-1)+f_n`

Hours data frequency cumulative frequency

0-4 4,2,4,3,2 5 5+0=5

5-9 5,6,9,8,8,6,6,9 8 5+8=13

10-14 10,12,14,11 4 13+4=17

15-19 15,16 2 17+2=19

20-24 21,22,23 3 19+3=22

Therefore the correct option is D.