In order to estimate the average number of miles that students who live off-campus commute to classes everyday, the following statistics were given: n = 50, = 5.21 and s = 2.48. The point estimate of the true population variance of is O A. 6.15 O B. 1.45 O C. 1.96 O D. 2.10 O E. 5.21Let X equal the widest diameter (in millimeters) of the fetal head measured between the 16th and 25th weeks of pregnancy. Assume that the distribution of X is N(46.68, 6.42). Let - be the sample mean of a random sample of n = 9 observations of X. Find P( x > 50). O A. 0.5505 O B. 0.4495 O C. 0.3015 O D. 0.0594 O E. 0.1985A random sample with n = 25 from the normal population yielded - = 11 and s