The Central Intelligence Agency (CIA) has specialists who analyze the frequencies of letters of the alphabet in an attempt to decipher intercepted messages. In standard English text, the letter a is used at a rate of 8.5%.Find the mean and standard deviation for the number of times the letter a will be found on atypical page of 2900 characters. (Round answer to one decimal place.) μ=μ= (Round answer to two decimal places.) σ=σ= Give the interval of usual values for the number of a's appearing on a page of 2900 characters. (Enter the answer as an interval in the form [a,b][a,b]. Round the endpoints to whole numbers that make sense in the context of the problem.) usual values =

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The Central Intelligence Agency (CIA) has specialists who analyze the frequencies of letters of the alphabet in an attempt to decipher intercepted messages. In standard English text, the letter a is used at a rate of 8.5%.

Find the mean and standard deviation for the number of times the letter a will be found on atypical page of 2900 characters.
(Round answer to one decimal place.)
μ=μ=
(Round answer to two decimal places.)
σ=σ=

Give the interval of usual values for the number of a's appearing on a page of 2900 characters.
(Enter the answer as an interval in the form [a,b][a,b]. Round the endpoints to whole numbers that make sense in the context of the problem.)
usual values =

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