Question

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A study found that subjects slept on average 20 minutes less on nights of the full moon than otherwise. Other researchers disagree and are interested in testing whether the mean difference in sleep is less than 20 minutes. A random sample of 100 subjects showed that they slept, on average, 10 minutes less on nights of the full moon than otherwise. Assume the population standard deviation is 15 minutes. Use a 0.01 significance level. 2. Underline the sentence or portion of the sentence that indicates the hypotheses. Identify the hypothesized population mean / proportion (with notation): Identify the sample mean/proportion (with notation): Identify the sample size (with notation): Identify the population or sample standard deviation (with notation) or write N/A: Identify the significance level (with notation): Determine the null & alternative hypothesis (using the notations): Determine if the test is left-tailed, right-tailed, or two-tailed: Determine the critical value: Determine the rejection regions:

Answer 1

Th Sentence thet Indkeat e te I O Ho 卢-p 8 01-0 0.04 C8) Stoce ule Meom 이