Suppose Matt wants to test the claim that the mean pulse rate of adult males is equal to 69 bpm, since he expects it to be lower. A random s

Question

Suppose Matt wants to test the claim that the mean pulse rate of adult males is equal to 69 bpm, since he expects it to be lower. A random sample of 140 adult males is used and found to have a mean of 68.3 bpm and a standard deviation of 10.7 bpm. Find the value of the test statistic.

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Faith 3 days 2021-10-12T07:05:58+00:00 1 Answer 0

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    2021-10-12T07:07:42+00:00

    Answer:

    z(s)  = – 0.7740

    Step-by-step explanation:

    Normal Distribution

    sample size  n = 140

    sample mean 68.3

    A ne tailed-test to the left from problem statement

    1.-Test hypothesis

    H₀           null hypothesis                  μ₀  = 69

    Hₐ   alternative hypothesis              μ₀  < 69

    2.- To find a value of test statistics  z(s)

    z(s)  =  [  ( μ  –   μ₀ ) /( σ /√n )

    z(s)  =  ( 68.3 –  69 ) / (10.7/√140)         ⇒  z(s)  = – 0.7*11.83 /10.7

    z(s)  = – 0.7740

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