Determine mean and variance

Reference no: EM1389832

1) A commuter travels many miles to work each morning. She has timed this trip 5 times throughout the last month. The time (in minutes) required to make this trip was 44, 39, 41, 35, and 41. The mean time required for this trip was 40 minutes. What is the variance for this sample data?

2) The ages of students in a class have been put into the frequency distribution below. What is the average age of these students?

Age Number of Students

18 3

19 5

20 28

21 4

Reference no: EM1389832

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