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The number of syntax errors in a programming assignment for 20 randomly selected students are as...

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The number of syntax errors in a programming assignment for 20randomly selected students are as follows:

21, 5, 44, 44, 22, 49, 2, 48, 17, 27, 21, 34, 24, 12, 43, 12,30, 10, 15, 15.

a. Construct an ordered stem-and-leaf display for this data.

b. Find the sample variance, S2 , and the sample standarddeviation, S, using the short-cut method.

c. Find the sample lower quartile Q1 , median Q2 andUpper-Quartile Q3 .

d. Construct a Box-plot for this data and  find the70th-percentile and interpret it.

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