.1.Construct the confidence interval for the population mean  style=”background-color:transparent;”>μ. -c=0.98 x=16.1 o(sigma)=4.0 and n=5598% confidence interval for U is _,_
2.Find the minimum sample size n needed to estimate μ for the given values of​ c, σ​, and E.c=0.95 σ​=7.9 and E=1
n=
3.People were polled on how many books they read the previous year. How many subjects are needed to estimate the number of books read the previous year within one book with 95​% ​confidence? Initial survey results indicate that σequals=17.9 books.
a) a 95% confidence level requires _ subjects4. A doctor wants to estimate the HDL cholesterol of all​ 20- to​ 29-year-old females. How many subjects are needed to estimate the HDL cholesterol within 22 points with 99% confidence assuming σ=14.4? Suppose the doctor would be content with 90% confidence. How does the decrease in confidence affect the sample size​ required?
a) a 99% confidence level requires _subjects
5.Construct the indicated confidence interval for the population mean μ using the​ t-distribution.c=0.90​, x =12.3​, s=2.0​, n=5the 90% confidence interval using a t distribution is _,_

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