Question

A sample of wind generation was tested for power output when the winds speed were 30 km/h. The following table gives the class marks of the power produced and the number of generators in each class. 1. Power (W) 65 66 67 6869 70 71 72 73 Number of Generators 4 7 142627 34 19 186 a. Find the Median b. Find the Mode. c. Find the Mean. d. Draw the histogram, label the results accordingly and create an appropriate title. e. Determine the standard deviation for the population and the sample. How many of the generators fall within 95% of the mean? g. How many of the generators fall within 99.74% of the mean? h. Draw the cumulative frequency graph (oive. abel the intervals accordingly.

Answer 1

Gav 65 25 51 18 112 131 149 一28 ー26 68 69 70 3t 19 34 38 54 2 72 13 59 = 0.3806 9怄.mode 8 te value."mnz te median sG