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An average computer mouse inspector can inspect 50 mice per hour with a population standard deviation of 10 mice per hour. The 46 computer mice inspectors at a particular factory can only inspect 45 mice per hour. Does the company have reason to believe that these inspectors are slower than average at α = 0.10?
A campus organization will select one day of the week for an end of year picnic. Assume that the weekdays, Monday through Friday, are equally likely and that each weekend day
The MIT team will receive 2 points for a win, 1 for a tie. and 0 for a loss. Find the PMF of the number of points that the team earns over the weekend.
In a recent year, the FCC reported that the mean wait for repairs for AT&T customers was 25.3 hours. In an effort to improve this service, suppose that a new repair service process was developed.
The regression line yˆ2 = 3 + 2x has been fitted to the data points (4,8), (2,5), and (1,2). The residual sum of squares will be:
Compute the Kappa statistic and its standard error reading reproducibility of the diagnosis of dyspnea in this clinic.
An experiment was performed to investigate lifetime of a component exposed to high heat. Three different oven types were used at either 550°F or 600°F.
The weight of the oranges, in pounds (1 pound = 16 ounces) is a random variable with standard deviation
Public health statistics indicate that about 26.4% of Americans smoke. Suppose a random sample of 50 people is selected. Approximate the distribution of the same proportion with the normal model.
Change the frequencies to percentages - is there a group more likely to get high salaries.
At the 0.05 level of significance, is there evidence to suggest that the population mean waiting time to check out is less than 10.73 minutes?
To forecast attendance at an yearly tennis tournament a model has been developed that uses attendance from the previous year and the amount spent for advertising this year.
We want to test the hypothesis that population B has a smaller variance than population A.
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