SMS per day |
|
ratio |
1. What is the level of measurement? |
|
3 |
|
21 |
2. Find the sample size n. |
|
4.5 |
|
3 |
3. Find the minimum. |
|
5 |
|
27 |
4. Find the maximum. |
|
5 |
|
24 |
5. Find the range. |
|
5 |
|
15 |
6. Find the midrange. |
|
5 |
|
5 |
7. Find the mode. |
|
6 |
|
8 |
8. Find the median. |
|
7 |
|
10.93 |
9. Find the sample mean x. |
|
7 |
|
7.56 |
10. Find the sample standard deviation sx. |
|
8 |
|
0.69 |
11. Find the sample coefficient of variation CV. |
|
8 |
|
4 |
12. Bin width |
|
9 |
|
|
13. Histogram |
|
10 |
|
|
|
|
10 |
|
Ball bounce bin upper limits (x) |
Frequency F |
Relative Frequency p(x) |
10 |
|
7 |
9 |
0.43 |
10 |
|
11 |
7 |
0.33 |
20 |
|
15 |
0 |
0 |
20 |
|
19 |
0 |
0 |
25 |
|
23 |
2 |
0.1 |
25 |
|
27 |
3 |
0.14 |
27 |
|
Sums: |
21 |
1 |
|
|
|
|
|
|
|
|
14. Sketch a relative frequency histogram of the data |
|
|
|
bimodal |
15. What is the shape of the histogram? |
|
|
|
0.43 |
16. p(x ≤ 7) = |
|
|
|
0.095 |
17. p(19 < x ≤ 23) = |
|
|
|
50.00% |
18. p(student has cell phone) = 30/60 |
|
|
|
More likely |
19. The probability that an FSM resident has a cell phone is estimated at 13% to 19%. |
|
|
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