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    Hypothesis testing and confidence interval

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    Exercise 8.5
    Find a confidence interval for u assuming that each sample is from a normal population.
    a. x = 14, sigma = 4, n = 5, 90 percent confidence
    b. x = 37, sigma = 15, 99 percent confidence
    c. x = 121, sigma = 15, 95 percent confidence

    Exercise 9.19
    Calculate the test statistic and p-value for each sample.
    a. H0 = u = 60 versus H1: u does not equal 60, sigma = 0.025, x = 63, sigma = 8, n = 16
    b. H0: u is greater than or equal to 60 versus H1: u < 60, sigma = 0.05, x = 58, sigma = 5, n = 25
    c. H0: u is less than or equal to H1: u > 60, sigma = 0.05, x = 65, sigma = 8, n =36

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    https://brainmass.com/statistics/z-test/solving-hypothesis-testing-confidence-interval-problems-166640

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    Step by step method for computing test statistic and confidence interval is given in the answer.

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