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A psychology researcher who does work in creativity wants to determine whether her sample of 50-year-old adults (N = 150) differs statistically from the population of 50-year-olds in intelligence. For her sample, she calculates the following: Mean = 109, SD = 10. (Hint: By definition, the mean IQ of this population is 100 and the population standard deviation is 15. Another hint: Use the z-test here!)
Perform a hypothesis test (comparing means) on the two populations below. Assume equal means and normal distribution.
1.a manufacturer receives parts from two suppliers. an srs of 400 parts from supplier 1 finds 20 defective. an srs of
That way you will have evidence to present to the director if you implement the cut in hours. Test the claim that there is no difference at the .01 significance level. Can you implement your staffing changes?
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What type of experimental design was used?- Explain why the traditional analysis of variance formulas are inappropriate for the analysis of these data.
Determine a pipeline system that will connect all 10 cities using the minimum number of miles of pipe, and indicate how many miles of pipe will be used.
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Revise the prior probabilities in light of the consultants track record - What is the posterior probability of good demand given that the consultant has indicated demand will be good?
How many different ways are there to arrange all letters in the word if copies of the same letter can be told apart?
Submit evaluation of the role of business strategy in advancing innovation. Your evaluation must include the following:
salt-free diets are often prescribed to people with high blood pressure. the data shown below were obtained from an
Cramming. One Thursday, researchers gave students enrolled in a section of basic Spanish a set of 50 new vocabulary words to memorize.
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