7/13/2020
Practice Test 2
13. The histogram shows the distribution of hurricanes that have hi...
Mathematics, 24.07.2020 18:01 bryantjorell
7/13/2020
Practice Test 2
13. The histogram shows the distribution of hurricanes that have hit a
country from 1851 through 2015, where 1 is the weakest level and 5 is
Hurricanes
the strongest level.
0.54 0.414
0.251 0.229
(a) Find the mean, variance, and standard deviation of the probability
Probability
0.4
0.3
0.2
0.1
0.01
0.094
0.012
distribution
(b) Interpret the results.
Category
(a) The mean is
(Type an integer or a decimal. Do not round.)
The variance is
(Round to two decimal places as needed.)
The standard deviation is
(Round to two decimal places as needed.)
(b) Interpret the results. Select all that apply.
A. The typical hurricane deviates from the mean by about 1 category level.
B. The typical hurricane deviates from the mean by about 2 category levels.
C. The average hurricane is approximately category 2.
1 P. The average hurricane is approximately category 1.
Answers: 1
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