It’s well established, we’ll assume, that lab rats require an average of 32 trials in a complex water maze before reaching a learning criterion of three consecutive errorless trials. To determine whether a mildly adverse stimulus has any effect on performance, a sample of seven lab rats were given a mild electrical shock just before each trial.
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Given that X 5 34.89 and s 5 3.02, test the null hypothesis with t , using the .05 level of significance. |
What is the research hypothesis? |
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What is the null hypothesis? |
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Is this a one-tailed or two-tailed test? |
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What are the degrees of freedom? |
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What is the t critical for .05 significance? |
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What is the calculated t? |
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Do you accept or reject the null hypothesis? |
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Construct a 95 percent confidence interval for the true number of trials required to learn the water maze. |
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Interpret this confidence interval. |
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