Q5 suppose the height of university trees(in meters) is normally distributed with mean u and standard deviation o. if the mean height of a random sample of 16 trees is (9.16) and the standard deviation of this sample is (2.5) meters then a lower confidence level for 95% C.I. for the population mean of all trees is: A) 8.26 B) 7.83 C) 3.67 D) (13.67, 16.33) E) NONE