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As part of a study of corporate employees, the Director of Human Resources for PNC, Inc. wants to compare the distance traveled to work by employees at their office in downtown Cincinnati with the distance for those in downtown Pittsburgh. A sample of 35 Cincinnati employees showed they travel a mean of 370 miles per month, with a standard deviation of 30 miles per month. A sample of 40 Pittsburgh employees showed they travel a mean of 380 miles per month, with a standard deviation of 26 miles per month. At the .05 significance level, is there a difference in the mean number of miles traveled per month between Cincinnati and Pittsburgh employees? Use the five-step hypothesis-testing procedure.
A bank official reported the results of a regression analysis designed to predict the bank's charges (y), measured in dollars per month, for services rendered to local companies.
Illustrate by computation that, for straight -line regression of Y on x, β1= 0.
At the .05 significance level, can we conclude that the mean waiting time is less than 3 minutes?
Obtain a test statistic and p -value. Interpret the results at α = .01.
What is the intercept for the logistic regression equation and What is a 95% confidence interval for the odds ratio
Drug sniffing dogs must be 95% accurate. A new dog is being tested and is right in 46 of 50 trials. Find a 95% confidence interval for the proportion of times the dog will be correct.
Develop a linear regression equation for the given data and forecast how much money Robert will win if he spends $30.
At the .05 level of significance, can we conclude that those joining Weight Reducers on average will lose less than 10 pounds? Determine the p -value.
How closely is the height of an individual related to the weight? Partial regression output for a sample of 92 individuals is below.
Otherwise you lose $1. If you make this wager very many times, what will be the mean outcome?
To avoid the problem of not having access to Tables of F distribution with values given for the lower tail, the numerator of the test statistic should be the one with:
An experiment was conducted to determine the effects of three different pesticides (P1,P2,P3) on the yield of three different varieties of citrus tree (V1,V2,V3).
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