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Assume you found out from your sample of 85 people, on average about 57 Kleenexes are used throughout the duration of a cold, with a population standard deviation of 15. Use the 95% confidence interval.
Approximately how many Kleenexes should go in the automobile glove compartment boxes?
A physiologist wishes to study the effect of birth control pills on exercise capacity. Five female subjects who have never taken the pill have their maximal oxygen uptake measured during a treadmill session.
Thirty-two samples of 8 items each were collected from a process. The average sample mean is 12 and the average range is 0.10. The upper and lower control limits, respectively, for an:
Confidence interval for the population mean - Prepare a 99% confidence interval for the population mean.
When 500 college students are randomly selected and surveyed, it is found that 135 of them own personal computers (based on data from the America Passage Media Corporation).
A machine has three components working independently. The probability that Component A fails is 0.1, the probability that component B fails is 0.2, and the probability that component C fails is 0.3.
How large should n be so that the standard deviation of is no more than 0.01 and sampling distribution
Use the normal distribution to approximate the desired probability. Find the probability that in 200 tosses of a fair die, we will obtain at exactly 30 faces.
What is the sample proportion from an American Express sponsored survey that found 355 of 546 business travelers use a laptop computer on overnight business trips?
Multiple choice question based on multiple regression - The t value obtained from the table to test an individual parameter at the 5% level
What is a 90% confidence interval for the mean monthly expenditure on gasoline per household in Slippery Rock?
Find out the probability that the return for common stocks will be more than 0%.
The ideal number of children. "What do you think is the ideal number of children for a family to have?" A Gallup Poll asked this question of 1016 arbitrarily chosen adults. Almost half (49%) thought two children was idea suppose that p = 0.49 is e..
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