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Suppose that the weights of airline passenger bags are normally distributed with a mean of 48.06 pounds and a standard deviation of 3.57 pounds. Let X represent the weight of a randomly selected bag. For what value of c is P(E(X) - c < X < E(X) + c)=0.84?
Explain with the help of a text or personal example, the use and application of Bayes' approach. Briefly, what is the history of Bayesian statistics
At a large department store, the amount a shopper spent and the shopper's gender (male or female) were recorded. To determine if gender is useful in explaining the amount of money a shopper spends at the store we could
Find out the confidence interval for the population mean also interpret the result. A researcher is interested in whether social assertiveness might be influenced by training procedures.
Assume that cans of Coke are filled so that the actual amounts have a mean of 12.00 oz and a stand. dev. of 0.11 oz. Find the P that a sample of 36 cans will have a mean amount of at least 12.19 oz.
Using the z table in Table E of Appendix C, determine the critical value for the hightailed test with a = 0.035.
What are the assumptions underlying a normal distribution? What are the assumptions underlying a binomial distribution? Why do we want to assume that our sample data represent a population distribution?
Percentage who say "Yes" from 7% to 3.5%? Explain to someone who knows no statistics the advantage of taking a larger sample in a survey of opinion.
Sketch the appropriate distribution, and locate the critical region for a = 0.05.
What is the sample proportion from an American Express sponsored survey that found 355 of 546 business travelers use a laptop computer on overnight business trips?
One suggested environmental determinant of pediatric lung function is the level of cigarette smoking in the home. A researcher wants to do a pilot study with two groups:
Quality Control A quality inspector checked for imperfections in rolls of fabric for one week. The random variable x represents the number of imperfections found.
When we take the sample of 100 of these average is $500 and SD is $100. (a) Determine statement to make about range $300 to $700?
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