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Determine the sample size n needed to construct a 95?% confidence interval to estimate the population mean when σ=38 and the margin of error equals 2. (view a table of standard normal cumulative probabilities.) n =?
A recent visit to a nursing home showed how many times nursing residents fell in the last 24 months.
If it has an emergency locator, what is the probability that it will not be discovered? If it does not have an emergency locator, what is the probability that it will be discovered?
With standard deviation of 15. Test hypothesis that Mrs. Smith and Mrs. Jones are equally effective teachers. Use 0.10 level of significance.
in a study undertaken by catalyst 43 of women senior executives agreed or strongly agreed that a lack of role models
What is the probability that all three of these individuals have Alzheimer's disease? What is the probability that at least one of the three people has Alzheimer's disease?
a sample of size 500 gave a sample proportion of 0.3. what is the standard error of the sample proportion? give your
Assume the distribution of ages of homes follow an approximately normal distribution. Show all the seven steps and include the p-value.
Find a 95% jackknife con?dence interval for the population mean mileage of the rental cars of this company.
Birth weights of babies in the United States can be modeled by a normal distribution with mean 3250 grams (7.165 pounds) and standard deviation 550 grams (1.213 pounds). Those weighing less than 2500 grams (5.512 pounds) are considered to be low b..
Find the probability that the number of rides for a randomly selected Disney World visitor is less than one standard deviation above the mean.
1. a medical researcher contends that lung capacity varies significantly between smokers and nonsmokers. the mean
Find the probability that the number who consider themselves baseball fans is? (a) exactly? five, (b) at least? six, and? (c) less than four.
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