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A report states that 46% of home owners have a vegetable garden. How large a sampl.e is needed to estimate the true proportion of home owners who have vegetable gardens to within 4 percentage points with 95% confidence?140, 238, 309, 476
What is the weighted mean profit per delivery - a bottling company offers three kinds of delivery service - instant, same day and within 5 days.
Explain whether the symmetry definition of probability is appropriate with respect to the outcomes in the sample space.
What is probability of selecting 2 families neither had taxes prepared by H&R Block?
Given are the numbers of times the machine was used over each of the last 30 days. Find out the mean number of times the machine was used per day.
A manufacturer of batteries for "kids' toys" wishes to investigate the length of time a battery will last. Tests results on a sample of 10 batteries indicated a sample mean of 5.67 and a sample standard deviation of 0.57.
Is the proportion of men who felt that division of housework was fair greater than the proportion of women who felt the division of housework was fair? Use alpha = .05 for the test.
An experimental study is designed to test the potency of a drug on 16 calves. Previous studies have shown that a 10-mg dose of the drug is lethal 7% of the time within the first 7 hours.
Describe the correct statistical procedures for analysis for how has quality of care changed in hospitals that are part of a pay for performance (P4P) program?
If many samples of size 1000 persons are chosen, determine the expected value (mean X-bar) or average of average IQ's for these samples?
Suppose that 20 minutes are selected independently and weighted. Let Y equal the number of these mints that weigh less than 30 grams.
She wants to be 90% confident and be accurate within 5% of the true proportion. Find out the minimum sample size necessary.
The National Survey of Student Engagement (NSSE) surveys freshmen and seniors about their level of engagement in campus and classroom activities that enhance learning.
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