The sampled population is normally distributed, with the given information. (Give your answers correct to two decimal places.) n = 18, x = 28.4, and σ = 5.7
(a) Find the 0.99 confidence interval for μ. ______ to ______
(b) Are the assumptions satisfied?
You may need to use the appropriate table in Appendix B to answer this question.
Ans.
(A).The sapmle is drawn from normal distribution with unkown mean . Given that
n = 18, sample mean xbar = 28.4, SD = 5.7
The 99% confidence interval for population mean
= Xbartcritical*SD/sqrt(n)
= 28.42.90*5.7/sqrt(18)
=(24.50, 32.296)
(B). Yes stisfied the assumptions
And we use the probability table .
The sampled population is normally distributed, with the given information. (Give your answers correct to two...
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