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Category: Psychology
Describe what is measured by the estimated standard error in the bottom of the independent-measures t statistic.
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Category: Psychology
When the null hypothesis is true, what is measured by the estimated standard error in the denominator of the independent-measures t statistic? a. The standard distance between a sample mean and its population mean b. The standard distance between two sample means selected from the same population c. The actual distance between a sample mean and its...
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Category: Psychology
Which of the following describes an independent-measures research study? a. Two separate samples are used to obtain two groups of scores to represent the two populations or two treatment conditions being compared. b. The same group of participants is measured in two treatment conditions to obtain two groups of scores. c. One group of participants i...
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Category: Psychology
Explain why t distributions tend to be flatter and more spread out than the normal distribution.
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Category: Psychology
Explain how the power of a hypothesis test is influenced by each of the following. Assume that all other factors are held constant. a. Increasing the alpha level from .01 to .05. b. Changing from a one-tailed test to a two-tailed test.
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