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![For the probability density function f defined on the random variable x, find (a) the mean of x, (b) the standard deviation of x, and (c) the probability that the random variable x is within one standard deviation of
the mean.
1
f(x) =
x, [5,9]
28
a) Find the mean.
%3D
(Round to three decimal places as needed.)
b) Find the standard deviation.
(Round to three decimal places as needed.)
c) Find the probability that the random variable x is within one standard deviation of the mean.
The probability is.
(Round to three decimal places as needed.)](https://content.bartleby.com/qna-images/question/ee2e25dc-949a-49f9-893c-6a598612cdf0/30747267-1814-4993-a013-3440b6e01936/p6txpm_processed.png)
