Question: To study how first-grade students utilize their time when assigned to a math task, a researcher observes 24 students and records their times off-task out

To study how first-grade students utilize their time when assigned to a math task, a researcher observes 24 students and records their times off-task out of 20 minutes. The dotplot appears on page 3. (courtesy of T. Romberg).

Times Off-Task (minutes)
4 0 2 2 4 1 4 6 9 7 2 7 5 4 13 7 7 10 10 0 5 3 9 8 For this data set, find:

(a) Mean and standard deviation.

(b) Median.

(c) Range.

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