4) You wish to generate a 95% confidence interval for the population mean of a sample from a population with a standard deviation of 12. What sample size will you need to draw if you require a 4 margin of error? What sample size would you need for a 2 margin of error? 5) To estimate the mean height of female high school juniors, you take a random sample of 30 female students and get these results (in inches). The = 5.3 51 67 68 61 69 58 56 60 56 66 61 60 59 72 59 54 58 53 68 63 57 62 63 64 059 56 62 58 67 57 70 a) Find the mean height of these juniors. b) Give a 99% confidence interval for the mean height of these juniors. c) Assuming that heights in this high school follow a normal distribution, does this information indicate the population mean height of these juniors is different from the do, conclude format. national average height of 64 inches? Use a 1% level of significance. Use state, plan, Isiveb biebneja eril bris web ons aalqme nodeiveb bisbale