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Periodically, Merrill Lynch surveys its customers to determine customer satisfaction levels. They want to determine the impact of experience on the satisfaction ratings of their consultants. The following are samples of survey ratings for two consultants:
Consultant A Consultant Bn 16 10mean 6.82 6.25s .64 .75
Test the assumption that the more experienced consultant has higher satisfaction ratings at the 5% significance level. Show all steps.
A sample of ten ER patients was conducted to determine their average wait time and to compare this to the target wait time. The hospital wants to make sure that patients do not wait more than 35 minutes. Test following hypotheses using a 95% con..
At Kelsey High School, Mrs. O'brien noted that the students were waiting too long in line for their lunches. After collecting some data, Ms. O'brien determined the mean wait time was 10 minutes.
A researcher conductued a study of the access speed of 35 hard drives and concluded that his maximum error of estimate was 35. If he were to conduct a second study to reduce the maximum error of estimate to 7, about how many hard drives should he ..
The following output is the result of running a linear regression on WEIGHT (y) = average weight in pounds for American females. Based on this regression model output, what will be the weight of a Russian Female who is 71 inches tall?
Assume you are the manager of a paint manufacturing factory. Your company has received complaints from customers that the containers hold less than the amount printed on them.
Develop a 99% confidence interval for the population proportion.
An airline finds that 5% of the persons making reservation on a certain flight will not show up for the flight. If the airline sells 180 tickets for a flight with only 175 seats,
Develop a spreadsheet model to determine the optimal number of magazines to order each day. Use 500 replications and round the demand values generated by the normal random number generator (RNG) to the closest integer value.
Given a normal distribution with a population mean of 100, a standard deviation of 10 and a sample size of n = 25, what is the probability that X is
Develop a linear regression model for these data and forecast the occupancy rate for next year if the Blue Sox win 88 games.
During a meeting, one hospital administrator indicated that 70% of the geriatric patients are males. What is the sample proportion of male patients?
Generate a 95% confidence interval for the difference in proportions of patients with hypertension between groups. Experimental (n=100) =14%
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