statistics

9. if we examine all birth records from the North Carolina State Center for Health Statistics for the calendar year 2001, we find that 85.8 percent of the pregnancies had delivery in week 37 or later. We will referto this as a full-term birth. With that percentage, we can interpret the probability of a recorded birth in week 37 or later as .858. [5 marks] a. If we randomly select fifty birth records from this population, what is the expected value of full-term births (mean)? b. If we randomly select fifty birth records from this population, what is the standard deviation? c. If we randomly select fifty birth records from this population, what is the probability that more than 46 of the records will be for full-term births? d. If we randomly select fifty birth records from this population, what is the probability that at least 38 are full-term births? e. If we randomly select fifty birth records from this population, what is the probability that 40 s x s 46 are full-term births