(a) How many subjects are needed to estimate the mean number of books read the previous year within four books with 90% confidence? This 90% confidence level requires 22 subjects. (Round up to the nearest subject.) (b) How many subjects are needed to estimate the mean number of books read the previous year within two books with 90% confidence? This 90% confidence level requires subjects. (Round up to the nearest subject.)

Construct an  80 %  confidence interval for the mean height of sons whose fathers are  70  inches tall. Round your answer to at least three decimal places. An  80 %  confidence interval for the mean height of sons whose fathers are  70  inches tall is   (this is part 2 of 2 of the math problem, please and thank you

(5) You take a random sample from some population and form a 98% confidence interval for the population mean, a. Which quantity is guaranteed to be in the interval you form? A. 0 B. u C. D. 0.98

Suppose you are given the following information from a sample of data: variance is 484 the number of observations in the sample is 65 for a confidence level of 96%, calculate the margin of error

Question 17: determine which is the 95% confidence interval and which is the 99% confidence interval. (60,120) (75,100)

9 The standard error of the mean is, a 0.881       b 0.735       c 0.612       d 0.510

Solve question #6 both part a and part b please and thank you.

you conducted additional studies with these men and found the following: a. The RR for those who drank one drink per day was 1.50 (95% CI:1.32-1.67) in comparison to the abstainers. b. For those men who drank three or more drinks per day the RR compared to the abstainers was 4.20 (95% CI 2.68-5.85).  Question:  We can tell from the Confidence Intervals provided in #7 whether there are likely more people in the “one drink a day” group or the “3+ drinks per day” group. Which one likely has more people and how can we tell?