Researchers measured the seated systolic blood pressure of 27healthy white males. The resulting publication reports x = 114 . 9 and s = 9 . 3. (a) Give a 95% con?dence interval for the mean blood pressure in thepopulation from which the subjects were recruited.(b) What conditions for the population and the study design are required by the procedure you used in (a)? Which of these conditions are important for thevalidity of the procedure in this case?