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Question: A nutritionist thinks the average person with an income below the poverty level gets less than the recommended daily allowance (RDA) of 800 mg of calcium. To test her conjecture, she obtains the daily intakes of calcium for a random sample of 45 people with incomes below the poverty level. The mean of the sample is 737.3 mg with sample standard deviation of 262.2 mg. Is there sufficient evidence at the alpha =0.05 level to support the researcher's claim?
Can Mr. Rutter conclude that the mean weight of the bags is less than 50 pounds? Use the 0.1 significance level. In a brief report, tell why Mr. Rutter can use the z distribution as the test statistic.
Formulate a linear program to determine the production plan for the next three months that will minimize the total cost. Develop an EXCEL spreadsheet to find the optimal solution for Contois Carpets.
Three-month period actually exceeds 1.5 days. Would it be reasonable to conclude that the mean amount of unpaid time lost has increased above the previously estimated 1.0 days? Explain.
The total losses, say X, divided by the total premiums, say T. The bonus equals (0.5 - L)(T/30) if L
Do the data in the sample represented in the Excel file support his contention at the .05 level of significance?
Carry out F test for significance of straight line regression of Y on X and interpret your results.
How might variance and standard deviation be applied to a real-world business-related problem? Provide a specific application in which these measures are useful.
Determine how large a sample would be necessary to estimate the population proportion with a margin of error of .05 at 95% confidence
Over the last ten years, the average GPA has been 3.0. Is this year's class significantly different from the long-run average? At what alpha level would it be significant?
56% are enrolled in school. If a sample of 500 such children is randomly selected, find the probability that at least 250 will be enrolled in school.
1.at what age do babies learn to crawl? does it take longer to learn in the winter when babies are often bundled in
Specify the null and alternative hypotheses you would use to determine if the opinions of Internet users are evenly divided among the four categories.
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