Question

Listed below are the numbers of hurricanes that occurred in each year in a certain region. The data are listed in order by year. Find the​ range, variance, and standard deviation for the given sample data. Include appropriate units in the results. What important feature of the data is not revealed by any of the measures of​ variation? 1,12,15,13,1,16,20,16,7,6,4,20,18,2 I got: Range = 19 Standard Deviation =? Variance =? and "The measures of variation reveal nothing about the pattern over time. Need Standard Deviation and Variance please.

Stats

Answer 1

Ans) Range = 19 , Variance = 50.181, SD = 7.084

Given:

1,12,15,13,1,16,20,16,7,6,4,20,18,2

Rangw = Max value - Min value = 20 - 1 = 19

And Total Data N = 14

Mean =

Variance of sample=

ans.

Standard Deviation =

ans.

/* NOTE: THERE IS DIFFERENCE BETWEEN POPULATION AND SAMPLE VARIANCE AND SD FOR SAMPLE WE DIVIDE BY N-1 AND FOR POPULATION WE DIVIDE BY N IN FORMULA */