A government agency has specialists who analyze the frequencies of letters of the alphabet in an attempt to decipher intercepted messages. In standard Englishtext, a particular letter is used at a rate of 5.4%.

a. Find the mean and standard deviation for the number of times this letter will be found on a typical page of 2800 characters.

=

(Do notround.)

=

(Round to one decimal place asneeded.)

b. In an interceptedmessage, a page of 2800 characters is found to have the letter occurring 169 times. Is thisunusual?

A.Yes, because 169 is greater than the maximum usual value.

B.Yes, because 169 is within the range of usual values.

C. No comma because 169 is within the range of usual values.

D. Yes comma because 169 is below the minimum usual value.