with a mean Of 60.5 inches and standard deviation of 2.5 inches. Calculate the 2-score lot - Ul American women aged 18 to 24 is approximately normally distributed six feet tall.(Answer: 2.60) 10 The population mean of the heights of five-year old boys is 100cm. A teacher measures her twenty five students, obtaining a mean height of 105 cm and standard deviation hypothesis test at level a = .05 to calculate whether the true mean is actually cm. (Answer: Fail to reject H.) and standard deviation 18. Perform 18 actually greater than 100