Question

# of Hurricanes from 1850-1920

year,#hurricanes.  

1850,2

1860,1

1870,1

1880,4

1890,4

1900,2

1910,6

1920,8

 

Mean: 3.500

Standard Deviation: 2.507

 

# of Hurricanes from 1930-2000

year,hurricanes.      

1930,16

1940,9

1950,15

1960,14

1970,8

1980,10

1990,14

2000,23

 

Mean: 13.625

Standard Deviation: 4.809

 

1. Calculate the Z score for the difference of the means.

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