The following data represent the scores of 50 students on a statistics exam. The mean score is

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The following data represent the scores of 50 students on a statistics exam. The mean score is 80.02, and the standard deviation is 11.90.

39 51 59 63 66 68 68 69 70 71

71 71 73 74 76 76 76 77 78 79

79 79 79 80 80 82 83 83 83 85

85 86 86 88 88 88 88 89 89 89

90 90 91 91 92 95 96 97 97 98

a) Determine what percentage of the scores lies within each of the following: one standard deviation of the mean; two standard deviations of the mean, three standard deviations of the mean.

b) Based on these percentages, explain whether the distribution of scores is mound-shaped and symmetric.

Posted Date: May 17, 2024 02:07 AM

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The following data represent the scores of 50 students on a statistics exam. The mean score is

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