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?

Answer 1

Explanation:

We have data in order

1, 7, 9, 10, 10, 12, 13, 14, 15, 16, 16, 16, 16, 20

Range = max - min=20 - 1=19 hurricanes

Standard deviation(sample)=
`\sqrt{(1)/(\eta-1)(\sum(x-x')^2)}`

for the given data=
`x'=(\sum x)/(\eta)=(175)/(14)=12.5`

standard deviation =
`\sqrt{(1)/(14-1)(1-12.5)^2)+...(20-12.5)^2}=4.816`hurricanes

Variance=(standard deviation)²=
`4.816)^2\\23.19\\23.2`hurricanes

Answer 2

where is the data ?

Explanation: