A government agency has specialists who analyze the frequencies of letters of the alphabet in an attempt to decipher intercepted messages. In standard English text, a particular letter is used at a rate of 5.7%. a. Find the mean and standard deviation for the number of times this letter will be found on a typical page of 1600 characters. muequals 91.2 (Do not round.) sigmaequals 9.3 (Round to one decimal place as needed.) b. In an intercepted message, a page of 1600 characters is found to have the letter occurring 102 times. Is this unusual?\",[{""content"":""<p><strong>Answer:<\/strong><\/p><p>A) \u03bc = 91.2; \u03c3 = 9.3<\/p><p>B) No<\/p><p><strong>Step-by-step explanation:<\/strong><\/p><p>To find the mean