Sample might have come from a normal population
The heights of 10 sixth graders are listed in inches: {51, 61, 54, 60, 58, 62, 55, 58, 59, 56}.
(a) Find the mean, median, mode, sample variance, and range.
(b) Do you think that this sample might have come from a normal population? Why or why not?
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The current advertising campaign for a major automobile brand would be changed if fewer than 70 percent of the consumers like it. Formulate the null and alternative hypotheses.
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A study was made by a retail merchant to determine the relation between weekly advertising expenditures and sales. The following data were recorded:
Say you are the manager of a perfectly competitive firm selling a product. Your business is making a loss because total revenue is less than total costs. What would you do--shut down or continue to op
Do you think that this sample might have come from a normal population? Why or why not?
The RC and More Superstore decides to track customer complaints. If they construct a Pareto chart, what is the cumulative percentage of the two leftmost bars?
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Find a 95% confidence interval for the true proportion of patients who experienced cotton mouth. Show your calculations and/or explain the process used to obtain the interval.
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