A sample of n = 16 individuals is selected from a population with µ = 30. After a treatment is administered to the individuals, the sample mean is found to be M = 33. A. If the sample variance is s2 = 16, then calculate the estimated standard error and determine whether the sample is sufficient to conclude that the treatment has a significant effect? Use a two-tailed test with α = .05. SM = __________________ tcritical = __________________ tcalculated = ___________________________ Decision = __________________ B. If the sample variance is s2 = 64, then calculate the estimated standard error and determine whether the sample is sufficient to conclude that the treatment has a significant effect? Use a two-tailed test with α = .05. SM = __________________ tcritical = __________________ tcalculated = ___________________________ Decision = __________________ C. Describe how increasing variance affects the standard error and the likelihood of rejecting the null hypothesis.
A sample of n = 16 individuals is selected from a population with µ = 30. After a treatment is administered to the individuals, the sample mean is found to be M = 33.
A. If the sample variance is s2 = 16, then calculate the estimated standard error and
determine whether the sample is sufficient to conclude that the treatment has a
significant effect? Use a two-tailed test with α = .05.
SM = __________________
tcritical = __________________
tcalculated = ___________________________
Decision = __________________
B. If the sample variance is s2 = 64, then calculate the estimated standard error and
determine whether the sample is sufficient to conclude that the treatment has a
significant effect? Use a two-tailed test with α = .05.
SM = __________________
tcritical = __________________
tcalculated = ___________________________
Decision = __________________
C. Describe how increasing variance affects the standard error and the likelihood of
rejecting the null hypothesis.
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