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The e-mail usage for two different plants of a large company was compared at level of significance 0.05. A sample of 100 employees was selected at each plant. The mean number of e-mail messages sent per employee for one plant was 16 per week and the standard deviation was 4. For the other plant, the mean was 15 and the standard deviation was 3. For the test of equal population means versus unequal population means, the absolute value for the computed test statistic, the critical values, and the p-value respectively are:
a. 2, ± 1.96, 0.0455
b. 3, ± 2.33, 0.0027
c. 3, ± 1.96, 0.0455
d. 2, ± 1.65, 0.0455
a professor gives tests that are either hard medium or easy. if she gives a hard test her next test will be either
Super Markets, Inc. is considering expanding into the Scottsdale, Arizona, area. Ms. Luann Miller, Director of Planning, must present an analysis of the proposed expansion to the operating committee of the board of directors
an airline knows from experience that the distribution of the number of suitcases that get lost each week on a certain
the population of a certain city is now 74000 people. if the population doubles every 25 years what will the
What is the probability that a consumer buys a can whose contents are actually less than the stated weight of 16 oz.?
A railway company operates a number of different services. One of these connects two cities and the journey time is assumed to be normally distributed with a mean of 125 minutes and a standard deviation of 5 minutes.
a new integrated computer system is to be installed worldwide for a major corporation. bids on this project are being
Suppose that the number of customers who enter a supermarket each hour is normally distributed with a mean of 570 and a standard deviation of 170.
However, 2% of the Dallas clocks are defective. If you go shopping and buy a clock from this company, what is the probability that you buy a defective clock?
The owner of a small computer store personally sells one computer per week on the average. Use the Poisson distribution to find the probability of randomly selecting a week in which she personally sold three computers.
Develop appropriate hypotheses such that rejection of H0 will support the researcher's contention.
a random sample of 625 12-ounce cans of fruit nectar is drawn from among all cans produced in a run. prior experience
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