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The estimated cost for a national poll is $10 per person interviewed. A project has a budget of $15,000 for the poll. The project manager wants to decide the required number of people to interview for the estimation of the proportion in the population following the presidential primaries in recent weeks. The confidence level must be 90% or above and the margin of error must be 5% or smaller. Give the manager a list of options within the budget and make a recommendation. Justify your answer. Note: don't just consider 95%.
according to the journal chemical engineering an important property of a fiber is its water absorbency. a random
suppose that you have 200000 to invest in stocks. if you invest 1000 in any particular stock your prot will be equal in
Assuming a normal distribution, What is the z-score associated with the second quartile? If we wish to have 95% confidence interval, what would be the value of the confidence coefficient?
A large retail corporation plans to sample sales receipts of its meat department to estimate the average size (in dollars) of a customer purchase. Previous analysis suggest that the standard deviation of the purchase amount is approximately $50.72..
Analysis of weekly widget production reveals that the number of widgets X produced in a week is a random variable with mean μX = 200 and standard deviation σX = 20. What are the mean and the standard deviation of C?
It is reasonable to model their weights as independent random variables, find the probability that 100 packages will have a total weight exceeding 1700 lb.
When a researcher has two samples with two means, one of the assumptions for two samples is independence of between the two samples. What does this mean? What happens if the independence assumption is violated?
Briefly explain how sample size affect outcome of hypothesis test. How does sample size affect measures of effect size?
the length of time between breakdowns of an essential piece of equipment is important in the decision of the use of
An apple juice producer buys all his apples from a conglomerate of apple growers in one northwest state. The amount of juice squeezed from each of these apples
In random, independent samples of 250 adults and 375 teenagers who watched a certain television show, 147 adults and 228 teens indicated that they liked the show.
Among coffee drinkers, men drink a mean of 3.2 cups per day with a standard deviation of 0.8 cups. assume the number of coffee drinks per day follows a normal distribution.
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