(8.) It has been reported that 83% of federal government employees use e-mail. I
ID: 3179504 • Letter: #
Question
(8.) It has been reported that 83% of federal government employees use e-mail. If a sample of 200 employees is selected, find the mean, variance, and standard deviation of the number who use e-mail.
n = , p= , r=
mean= , Variance=, SD=
(9.) A survey found that 21% of Americans watch fireworks on television on July 4. Find the mean, variance, and standard deviation of the number of individuals who watch fireworks on television if a random sample of 1000 Americans is selected.
n = , p= , r=
mean= , Variance=, SD=
(10.) In a restaurant, a study found that 42% of all patrons smoked. If the seating capacity of the restaurant is 80 people, find the mean, variance, and standard deviation of the number of smokers.
n = , p= , r=
mean= , Variance=, SD=
(11.) Find the mean, variance, and standard deviation for the number of head when 10 coins are tossed.
n = , p= , r=
mean= , Variance=, SD=
ready found that of perrons capacity the rest rant of the number smokers varionce, and Standord dewiatien fer the nunber ut head when i0 Find the meanExplanation / Answer
as mean =np
variance =(np(1-p)
and std deviation =(variance)1.2
hence from above data
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n 200 p 0.83 mean 166 Variance 28.22 SD 5.3122Related Questions
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