Question 882901
Assume the researcher is using an alpha value of .05 in analyzing the results of the experiment, and that she is interested in whether the RT of the experimental group is greater than the RT of the control group. Also assume that RT scores generally tend to be normally distributed, and that the researcher has a sample of at least 30 participants in each group to compare, but that the population parameters are not known.
 1. State the null and alternative hypotheses, both in words and in symbols.
Ho: u(eg)u(etrl) <= 0
Ha: u(eg)-u(ctrl > 0
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2. Under the conditions described in the scenario, what statistical test would be appropriate? Explain the rationale for your answer. (3 points)
Difference of means
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 3. Would it be most appropriate to use a two-tailed test, a left-tailed test, or a right-tailed test? Why?
Right-tailed because Ha is a "greater than" relation.
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 4. In one paragraph, describe the conclusion you would reach about the participants’ performance if the P-value of the hypothesis test was determined to be .065. Include the rationale for your conclusion.
Since the P-value is greater than 0.05, reject Ho.
The test results would support the researches concection that
RT's are greater for the experiment group.
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Cheers,
Stan H.
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