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A market research analyst for Apple Computer estimates that 48% of PC users have never used a Mac, and that by providing a hands-on experience the sales of Macs to PC owners can be increased.
To test the hypothesis that 48% of PC users have never used a Mac, the analyst took a sample of 50 PC customers drawn at random and found that 22 of them had never used a Mac.
Write the regression equation approximately. Computed the coefficient of determination(r 2 ).
State the hypothesis test (with the formula of test statistic) could be used to see if the show-up ratio of people booked tickets is larger than 0.7.
What is the p value? Describe the steps in formal hypothesis testing. Make at least one comment for each step.
Test the hypothesis that the machines are showing difference qualities of performance. Use 5 per cent level of significance.
The length of a particular telemarketing phone call, x, has an exponential distribution with mean equal to 1.5 minutes.
Find the asymptotic distribution of the MLE of the indicated parameter and find formulas for approximate standard errors of the MLE.
Find a 98% confidence interval for the mean number of days required for successful completion of physical therapy for patients in the average group. Discuss the results.
Use the continuity correction and describe the region of normal curve that corresponds to the indicated binomial probability. The probability of more than 50 right answers.
Conduct a one-tailed hypothesis test given the information below. A certain brand of Green Energy light bulbs was advertised as having an average illumination life-span of 2,500 hours.
Clark Heter is an industrial engineer at Lyons Products. He would like to determine whether there are more units produced on the afternoon shift than on the day shift.
You are estimating the install hours for an electronics upgrade based on the number of components affected. The upgrade for which you are estimating affects 25 components. Given the following equation, select the correct response from each pair.
The manufacturer of a nationally known "lite beer" claims that the approval rating for it's product is at least 85%. A local soft drink manufacturer has retained a marketing agency to test the "lite beer".
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