Question

You are a teacher of a group of 30 students and then take the test.

56        50        45        42        33        34        42        55        58        51        50        48

34        42        48        49        30        25        22        44        56        52        48        49

48    40        45        51        47        39.

1. Organize the scores into a simple frequency distribution.
2. Calculate the fashion
3. Calculate the median
4. Calculate the average
5. Calculate the Mean Deviation
6. Calculate the Standard Deviation of the scores and interpret the result (heterogeneous or homogeneous).
7. Calculate the variance
8. Convert the scores into percent and grant the corresponding grade (grade):
90 - 100 A
80 - 89 B
70 - 79 C
60 - 69 D
0 - 59 F
9. Illustrate the result of the notes on a pie chart

10. Illustrate the result of the notes in a bar graph

Answer 1

1.

Marks	Frequency
22	1
25	1
30	1
33	1
34	2
39	1
40	1
42	3
44	1
45	2
47	1
48	4
49	2
50	2
51	2
52	1
55	1
56	2
58	1
N=	30

2.

Median of Marks

Median of Marks = 47.5

3.

Mean of Marks

Mean of Marks = 44.4333

4.

Mean deviation about mean =     7.08000

5.

Standard deviation of Marks = 9.04656

6.

Variance    81.8402