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0 Question 4 v b. For the group of 9, find the probability that the average number of friends is more than 145. c. Find the third quartile for the average number of Facebook friends. d. For part b), is the assumption that the distribution is normal necessary? C] NCO Yes . Question 5 1pt 1 99 0 Details The average score for games played in the NFL is 20.5 and the standard deviation is 8.9 points. 17 games are randomly selected. Round all answers to 4 decimal places where possible and assume a normal distribution. a. What is the distribution of a? ~ ~ N( b. What is the distribution of c. P(x > > 347.8557) = h. For part c) and e), is the assumption of normal necessary? Yes No\f. Question 7 v 41 pt '01 899 Details The number of seconds X after the minute that class ends is uniformly distributed between 0 and 60. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X ~ U(-, -) then the sampling distribution is b. Suppose that 35 classes are clocked. What is the distribution of 5: for this group of classes? 2% - N( --> c. What is the probability that the average of 35 classes will end with the second hand between 29 and 37