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A survey is being planned to determine the mean amount of time corporation executives watch television. A pilot survey indicated that the mean time per week is 20 hours, with a standard deviation of 5.5 hours. It is desired to estimate the mean viewing time within two-quarter hour. The 90 percent level of confidence is to be used.
a) How many executives should be survyed? Number of executives ______. (Round up your answer to the next whole number.)
Given that alarm has just sounded, find out the probability that real emergency situation exists?
The Johnson family uses a propane tank for cooking on their gas grill. During the summer they need to replace their tank on average every 30 days.
At the .01 significance level, is there a difference in the mean number of times men and Women order take-out dinners in a month? What is the p -value?
Compute mean absolute percentage error (MAPE) of the forecasts.
Draw suitable distribution curve indicating position of the TS and CV.
The sample size n, the sample means, and the sample standard deviations for the two groups are given
Compute an F-statistic for each linear construct and determine its significance.
Job Interviews: Based on information from MRINetwork, some job applicants are required to have several interviews before a decision is made. The number of required interviews and the corresponding probabilities are: 1 (0.09); 2 (0-31); (0.37); 4 (..
If is the proportion of the next 100 shoppers that buy a packet of the crackers after tasting a free sample, then the probability that fewer than 30% buy a packet after tasting a free sample is approximately.
As part of their application for a loan to buy Lakeside Farm, a property they hope to develop as a bed-and-breakfast operation, the prospective owners have projected:
What is the estimated standard error of the sample mean? Construct a 95 percent confidence interval for the population mean category fluency test score.
Show the decision rule graphically. Use the .05 significance level.
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