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Stats 250 W12 Sunday Mar 25 Exam 2 Review Solutions


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Unformatted text preview: hat is the appropriate conclusion at the 5% level? There is a significant difference in the likelihood of a resistant attitude for the two reactivity populations. d. What type of error could the researcher have made? Clearly circle one. Type I Error Type II Error Cannot be determined 3. How old is your Professor? – Consider the population of all full professors at a very large university. The mean age for this population is 48 years and the standard deviation is 5 years. A random sample of 100 full professors will be taken and the sample mean age will be computed. a. Give the mean and standard deviation for the distribution of the sample mean age based on a random sample of 100 full professors. Include the units. Mean : ____48 years ______ Standard deviation: __5/√ = 0.5 years _______ b. What is the approximate probabilit...
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