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Bonnie Rogers, the customer relations manager for a large computer manufacturer, has recently studied the duration of telephone calls received by the company's technical support department. The call lengths are exponentially distributed, with a mean duration of 8 minutes. Experience has taught Bonnie that lengthy calls usually can be more efficiently handled by a technical support manager, rather than by the less experienced personnel who receive the initial technical inquiry.
To avoid having the higher-paid managers virtually take over the task of handling technical support, Bonnie would like to have only the longest 10% of the calls redirected to a technical support manager. How long must a technical support call last before it qualifies for redirection to a technical support manager?
Test the hypothesis that the true Pearson correlation (p) is significantly different from zero. Provide a (p) value (two-tail) n=12. Correlation intake is .448 for the two recording methods.
A manufacturer of small appliances purchases coffeepot handles from an outside vendor. If a handle is cracked, it is considered defective and can't be used
three vendors have vegetable stands in a row. customers arrive at the stands 1 2 and 3 at rates 10 8 and 6. a customer
Treat the relative frequencies as probabilities and determine the probability that an arbitrarily chosen boy responds Yes.
In its Traffic Safety Facts 2005, the National Highway Traffic Safety Administration reported that 6.3% of licensed drivers were between the ages of 15 and 20, yet this age group was behind the wheel in 15.9% of all fatal crashes.- Use these stati..
Based on a scatter diagram, would you estimate the linear correlation coefficient to be:
find the critical value. assume that the test is two-tailed and that n denotes the number of pairs of data. n 7 a
a nonprofit company concerned with the school dropout rate in a nearby state has designed a tutoring program aimed at
After you meet with Kathy, she still refuses to attend the classes, so you decide to provide her with a pamphlet that will provide education on pregnancy self-care and newborn care essentials.
Using the p- value approach, test the hypotheses at the 5% level of significance.
a traffic control engineer reports that. 75 of the vehicles passing through a checkpoint are from within the state.
the answer should be 4e-6the current test for the h7n9 avian flu is a blood test. it requires withdrawing blood from
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