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A poll done for Newsweek found that 13% of Americans have seen or sensed the presence of an angel. A contingent doubts that the percent is really that high. It conducts its own survey. Out of 100 Americans surveyed, only 3 had seen or sensed the presence of an angel. As a result of the contingent's survey, at a 5% level of significance, would you agree with the Newsweek poll?
In your answer, show your hypothesis [you must use the Ho and Ha format to get credit], your calculated z or t score, and your decision to reject or fail to reject the null hypothesis.
What is the company's expected cost for computer breakdowns and the variance of the breakdown cost? What assumption must you make to find the variance? Is this a reason- able assumption?
From her firm’s computer telephone log, an executive found that the mean length of 64 telephone calls during July was 4.48 minutes with a standard deviation of 5.87 minutes.
Determine the probability that mean annual snowfall during 40 randomly picked years will exceed 111.8 inches?
airlines overbook tickets sales based on the assumption that a percnetage of passengers will not show on the day.
a below are the numbers of deaths from tornados in the u.s. from 1990 through 2000.53 39 39 33 69 30 25 67 130 94
A number of tubes of toothpaste purchased by a typical family is a random variable having a Poisson distribution with an average of 1,8 tubes per month
Find the probability that X is exactly 10. - Find the probability that X is at least 5. - Find the probability that X is no more than 25.
What is the probability that both defective lights will be found within three trials?
Construct a 90 percent confidence interval for the true mean weight. Describe factors which might cause variation in the weight of Tootsie Rolls during manufacture.
provide me with a simple brief statement about the post belowcorrelation does not imply causation is a phrase that
The measurements (in millimeters) for the period from 8:00 a.m. to 10:30 a.m. follow. Use Microsoft Excel to design a mean chart and a range chart. Is the process in control or out of control?
suppose a random sample of 100 u.s. companies taken in 2005 showed that 21 offered high-deductible health insurance
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