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A researcher wishes to be 99% confident that her estimate of the true proportion of individuals who travel overseas is within 4% of the true proportion. Find the sample size necessary if in a prior study, a sample of 200 people showed that 40 traveled overseas last year. If no estimate of the sample proportion is available, how large should the sample be? Show step by step.
In testing a new drug, researchers found that 6% of all patients using it will have a mild side effect. a random sample of 11 patients using the drug is selected. find the probability that exactly two will have this mild side effect.
75% of students live in dormitories. A random sample of 5 students is selected. Using the binomial probability tables, find the probability that none of the students lives in the dormitories?
Sample data are reported for 50 employees of small companies, 75 employees of medium companies, and 100 employees of large companies.
11% needed to be serviced once, 5% twice, 4% three times, and none required more than three repairs. what are the expected no of repairs per year.
1. in each of the situations below an experiment is conducted. determine whether or not the experiment is a
according to u.s. news amp world report data in 1995 tuition costs at indiana university a public university were 2984
Can researcher conclude that humidity has significant effect on eating behaviour? Use two-tailed test with a = 0.05.
How much production capacity should the manufacturer reserve for the last day?
Weights are distributed normal with a mean of 132 pounds and a standard deviation of 27.4 pounds. In a random sample of 150, how many of them would be expected to weigh between 100 and 115 pounds?
Two impendent samples of signs 9 and 8 gave the sum of squares of deviation from their respective means as 160 and 91 can the samples be regarded as drawn from the normal population with equal variance
identify the type of sampling used random systematic convenience stratified or cluster. to estimate the percentage of
Determine the mean for list of numbers. 6, 5, 9, 4, 14, 9 (Round to the nearest tenth)
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