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The mean life of a certain computer hard disk in continual use is 7 years.
(a) How long a warranty should be offered if the vendor wants to ensure that not more than 27 percent of the hard disks will fail within the warranty period? (Round your intermediate values to 4 decimal places and final answer to 4 decimal places.)
Period of warranty years
(b) How long a warranty should be offered if the vendor wants to ensure that not more than 47 percent of the hard disks will fail within the warranty period? (Round your intermediate values to 4 decimal places and final answer to 4 decimal places.)
For each study, on the basis of the information given, is it clearly a randomized experiment? If not, explain what additional information would make it clear that the study was a randomized experiment rather than an observational study.
Run simulation using Oracle crystal ball
The Nyquist plot of a conditionally stable system is shown in Figure P9.4 for a specific gain K. (a) Determine whether the system is stable, and find the number of roots (if any) in the right-hand s-plane.
a random sample of 25 lunch orders at noodles and company showed a mean bill of 10.36 with a asample standard deviation
Identify the dependent variable and the independent variables in this study. Also, state the Omnibus Null and Alternative hypotheses.
Assuming the nurses surveyed were a random sample from the population of all nurses in the United States, we can use these data to test the null hypothesis H0 that there is no association between the row and column variables in this two-way table...
Interpret the results and compare the widths of the confidence intervals. If? convenient, use technology to construct the confidence intervals.
The Globe Fishery packs shrimp that weigh more than 1.91 ounces each in packages marked" large" and shrimp that weigh less than 0.47 ounces each into packages marked "small"; the remainder are packed in "medium" size packages.
100 people are given a standard antibiotic to treat an infection and another 100 are given a new antibiotic. In the ?rst group, 90 people recover; in the second group, 85 people recover.
a banking consultant is investigating if the proportion of households with saving above 20000 has increased from last
Test the hypothesis that the respondents' borrowing habits are independent from what they believe their parents' attitudes to be.
PSY-380. Conduct a One-Way ANOVA on the data to determine if a relationship exists. Find the mean hours of exercise per week by the participants
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