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Answer to Question #4718 in Statistics and Probability for charles

Question #4718
The following scores were obtained by 70 students in a Statistics Examinations:
77 68 70 84 68 38 72 82 86 22
66 90 87 53 3 39 28 16 7 38
39 23 50 33 30 64 10 84 49 17
15 79 37 92 8 30 96 8 62 64
25 87 45 96 78 69 40 89 48 41
60 28 99 19 15 95 96 49 8 6
49 14 57 96 97 81 13 55 95 89
(a) Arrange the data in a frequency distribution with classes: 0-9, 20-29, 30-39, 40-49, 50-59, 60-69, 70- 89, 90-109
(b) Draw a histogram for the distribution.
(c) Calculate the:
(1) Mean
(2) Mode
(3) Median
(4) Variance
(5) Standard deviation
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