There are two STAT short questions.

Question 4 5 pts In order to obtain the mean head circumference for infants treated for Pulmonary Hypertension with a population 5. d. of 2.1 cm, and a 90% condence, determine the sample size required to have a margin of error, of 0.5 cm. Question 5 6 pts A New York Times article noted the mean life span for 36 male symphony conductors was 73 years, with a s.d of 8.7 years obtain a 98% condence interval for the mean life span of male symphony conductors. What assumptions did you make in the above