(I DONT WANT ANY WORKING METHODS I JUST NEED ANSWERS)

7. The following is the number of hours students worked per week at after-school jobs.

2	2	4	6	7	8	10	10	12	13
13	15	17	17	17	17	20	20	21	23

Use the data to complete the following frequency distribution.

Number of Hours	Frequency
0 -4
5 9
10 14
15 19
20 - 24

1. Frequency: 3, 3, 4, 6, 4
2. Frequency: 3, 3, 5, 4, 5
3. Frequency: 3, 3, 5, 5, 4
4. Frequency: 3, 2, 6, 5, 4

8. The following is the number of hours students worked per week at after-school jobs.

2	2	4	6	7	8	10	10	12	13
13	15	17	17	17	17	20	20	21	23

Use the data to complete the following relative frequency distribution.

Number of Hours	Relative Frequency
0 -4
5 9
10 14
15 19
20 - 24

1. Relative frequency: 0.15, 0.15, 0.20, 0.30, 0.20
2. Relative frequency: 0.15, 0.15, 0.25, 0.20, 0.25
3. Relative frequency: 0.15, 0.15, 0.25, 0.25, 0.20
4. Relative frequency: 0.15, 0.10, 0.30, 0.25, 0.20

14. The ________ can be found by subtracting the lowest value from the highest value in the data set.

1. standard deviation
2. variance
3. median
4. range

16. Use the given frequency distribution to find the

(a) class width.

(b) class midpoints of the first class.

(c) class boundaries of the first class.

Height (inches)
Classes	Frequency
50 - 52	5
53 55	8
56 58	12
59 61	13
62 64	11

(a) 3 (b) 51 (c) 50-52

(a) 3 (b) 51 (c) 49.5-52.5

(a) 2 (b) 51.5 (c) 50-52

(a) 2 (b) 51.5 (c) 49.5-52.5

20. Calculate the standard deviation of the frequency distribution.

Kilometers (per day)
Classes	Frequency
1 - 2	7
3 4	15
5 6	30
7 8	11
9 10	9

1. 18.97
2. 2.24
3. 8.49
4. 3.45