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(Solved): Question 3-10 marks A random sample of 90 observations produced a mean \bar{x} =25.9 and a standard ...
Question 3-10 marks A random sample of 90 observations produced a mean
\bar{x} =25.9and a standard deviation
s=2.7. a. Find a
95%confidence interval for the population mean
\mu . b. Find a
90%confidence interval for
\mu . c. Find a
99%confidence interval for
\mu . \table[[Table 7.2 Commonly Used Values of
z_((\alpha )/(2)),,,],[Confidence Level,,,],[
100(1-\alpha )%,
\alpha ,
(\alpha )/(2),
z_((\alpha )/(2))