Find the indicated confidence interval. Assume the standard error comes from a bootstrap distribution that is approximately normally distrib

Question

Find the indicated confidence interval. Assume the standard error comes from a bootstrap distribution that is approximately normally distributed. A 90% confidence interval for a mean μ if the sample has n-80 with X-22.1 and s = 5.6, and the standard error is SE = 0.63.

The 90% confidence interval is to :_________

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Hải Đăng 3 months 2021-07-28T08:41:54+00:00 1 Answers 6 views 0

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    2021-07-28T08:43:15+00:00

    Answer:

    (21.064 ; 23.136)

    Step-by-step explanation:

    Given :

    Sample, n = 80

    Mean, xbar = 22.1

    Standard deviation, s = 5.6

    Standard Error, S. E = 0.63

    Confidence interval :

    Xbar ± Zcritical * S.E

    22.1 ± (1.645 * 0.63)

    22.1 ± 1.036

    Lower boundary = 22.1 – 1.036 = 21.064

    Upper boundary = 22.1 + 1.048 = 23.136

    (21.064 ; 23.136)

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