In a study of government financial aid for college​ students, it becomes necessary to estimate the percentage of​ full-time college students who earn a​ bachelor's degree in four years or less. Find the sample size needed to estimate that percentage. Use a 0.02margin of error and use a confidence level of 95​%. Complete parts​ (a) through​ (b) below. a. Assume that nothing is known about the percentage to be estimated.   n=   b. Assume prior studies have shown that about 55​%of​ full-time students earn​ bachelor's degrees in four years or less.   n=

A doctor wants to estimate the mean HDL cholesterol of all​ 20- to​ 29-year-old females. How many subjects are needed to estimate the mean HDL cholesterol within 3 points with 99% confidence assuming s=17.8 based on earlier​ studies? Suppose the doctor would be content with 99% confidence. How does the decrease in confidence affect the sample size​ required? a. A​ 99% confidence level requires _______ subject. b. 90% confidence level requires ________ subject. c.How does the decrease in confidence affect the sample size​ required? a.Decreasing the confidence level decreases the sample size needed.   b.Decreasing the confidence level increases the sample size needed.   c.The sample size is the same for all levels of confidence.

In a study of government financial aid for college​ students, it becomes necessary to estimate the percentage of​ full-time college students who earn a​ bachelor's degree in four years or less. Find the sample size needed to estimate that percentage. Use a 0.01 margin of error and use a confidence level of 90​%. Complete parts​ (a) through​ (c) below. a. assume that nothing is known about the percentage to be estimated. n=___?  (round up to the nearest interger) b.  assume prior students earn bachelor's degrees in four years or less. n=____?  (round up to the nearest interger) c.  Does the added knowledge in part b have much of an effect on the sample size?     a. No, using the additional survey information from part b only slightly reduces the sample size.     b.  Yes, using the additional survey information from part b only slightly increases the sample size.      c.  Yes, using the additonal survey information from part b dramatically reduces the sample size..      d.  No, using the…

In a study of government financial aid for college students, it becomes necessary to estimate the percentage of full-time college students who earn a bachelor's degree in four years or less. Find the sample size needed to estimate that percentage. Use a 0.04 margin of error and use a confidence level of 95%. Complete parts (a) through (c) below. a. Assume that nothing is known about the percentage to be estimated. n= (Round up to the nearest integer.) b. Assume prior studies have shown that about 55% of full-time students earn bachelor's degrees in four years or less. n= (Round up to the nearest integer.) c. Does the added knowledge in part (b) have much of an effect on the sample size? O A. No, using the additional survey information from part (b) does not change the sample size. O B. Yes, using the additional survey information from part (b) dramatically reduces the sample size. Oc. Yes, using the additional survey information from part (b) only slightly increases the sample size. O…