Percentiles: a. Identify the data value of the 18^th percentile, P_18. b. For th

Question

Percentiles: a. Identify the data value of the 18^th percentile, P_18. b. For the data value 40, find in which percentile it is located. You can solve this problem manually or use statistical software. If you use software, attach all software calculations, graphs, tables, diagrams. Here are commuting times collected from a sample of students: 30, 8, 25, 10, 12, 20, 25, 30, 20, 15, 10, 15, 5, 10, 20, 15, 60, 15, 30, 25, 25, 15, 10, 15, 25, 10, 8, 25, 15, 15, 5, 10, 15, 15, 10, 60 Do the values appear to be obtained through actual measurements? To earn credit for this problem you must explain the reason for your answer.

Explanation / Answer

9. The frequency table for the given data is:

Frequency table results for var1:
Count = 36

From this frequency table, we can observe that data doesn't seem to be obtained through actual measurement because out of 36 values, 34 values are occuring in the multiples of 5 which is an unusual event.

var1 Frequency 5 2 8 2 10 7 12 1 15 10 20 3 25 6 30 3 60 2

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