Determining The Sample Size For A Hypothesis Test About A Population Mean. How To Calculate a Test Statistic. O two-tailed test 2 H a.
If it is far away then it is unlikely that the null hypothesis is true and one rejects it. μ s n 83 85 12 61 13. Z y.
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The table below gives sample sizes for a two-sided test of hypothesis that the mean is a given value with the shift to be detected a multiple of the standard deviation. So you need to take a random sample of at least 211 college students in order to have a margin of error in the number of. μ 0 σ n. Find a sample size large enough to have a power of 080 when differentiating between a mean of 110 and mean of 112 with alpha001 two tailed test and a population standard deviation of 15.
