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Need help solving 1. (18 pts) Twenty students took a test. The following are the scores. 77 59 84 83 70 80 83 82 85

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1. (18 pts) Twenty students took a test. The following are the scores. 77 59 84 83 70 80 83 82 85 92 97 88 87 86 99 93 79 63 81 68 Answer/Find the following for the above sample a. Mean: 81 . 8 b. Median: 83 c. Mode: 83 d. Standard Deviation: 10 .50 e. Variance: 110.27 f. First quartile: 18 g. Third Quartile: 87.5 h. Find the z-score for the value 92. Would it be unusual to get 92? Explain. Z = 92 - 81.8 = 0.97 10.50 i. Construct a frequency distribution with 5 classes

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