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A recent study stated that if the person chewed gum, average number of sticks of gum he or she chewed daily was 8. To test claim, researcher selected the random sample of 36 gum chewers and found mean number of sticks of gum chewed per day was 9. Standard deviation of population is 1. At α = .05, is number of sticks of gum person chews per day actually is greater than 8?
Explain the difference between descriptive and prescriptive (optimization) models. Describe how to use Excel data tables, scenario manager, and goal seek tools to analyze decision models.
Assume that a 95% confidence interval for the mean is 14.5
A record executive is interested in the popularity of her label's newest band, The Standard Deviations. She asks 10 people how many Standard Deviations songs they know.
Make a point estimate of the population mean difference in endurance after taking the herbs. Make a 95% confidence interval estimate of the population mean difference.
A new-car dealer is leasing various brand-new models for the monthly rates(in dollars) listed below. Estimate the true population variance and standard deviation in leasing rate with 90% confidence.
The Weschsler IQ test has a μ =100 and a σ = 15. A vitamin company said if people took vitamin X for 30 days their IQ would improve. A simple random sample of 49 people took the vitamins for 30 days. They then took the IQ test. The mean IQ of the ..
A financial advisor has recommended two possible mutual funds for investment: Fund A and Fund B. The return that will be achieved by each of these depends on whether the economy is good, fair, or poor.
The following data represent scores of 50 students in the applied business statistics test. Prepare the frequency distribution table and the frequency histogram for this data set.
Help with showing how do detrime the standard deviation of a problem when the standard deviation is 5. An example would help me to work out a problem for the normal probability distribution.
Describe a situation in which correlation analysis or regression analysis can be (or was) misused to explain cause and effect relationship in a case of fortuitous correlation.
Search the library for a scholarly journal article of a study that presents the results using correlation analysis. Summarize the article, explain how the correlation was used, and the value of correlation analysis.
Explain the overall statistical significance of the model, Explain the statistical significance for each independent variable in the model
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