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Given that x-bar = 18.60, s = 3.48, n = 18, and the population is known to be normally distributed, find the LOWER boundary, only, of the 95% confidence interval for µ. Express your answer with 2 places of decimal. Note that confidence intervals are always two-tailed unless otherwise specified. (This IS a two-tailed interval but onQ will only accept one number and we will enter the lower boundary of the two-tailed interval.)
If two voters are randomly selected for a telephone survey, what is the probability that the first one is a Democrat followed by a Republican?
Three families, each with three members, are lined up at random for a picture. What is the probability that members of each family happen to be together (that is, not separated by someone from another family) in the picture?
Find the relative standard distance by assuming that the study area is a rectangle with coordinates of (0,0) in the southwest and (6,6) in the northeast.
For a family with three children, what is the probability that parents will spend less than one hour driving kids on a randomly selected day?
Are there any problems to the corporation or to Ms. Zamora?
Is P(K + 1) = P(K)(365-K)/365 and, If so, why? Find the smallest class size K for which the probability that two or more students have the same birthday exceeds 0.5.
We want to test a claim that we have reduced the average wait time at our bank from year one to year two. We have a sample of 40 wait times from each year, but the average and standard deviations for each year are not known. Which statistical test..
How large a sample size will need to be selected if we wish to have a 99% confidence interval with a margin for error of .10 oz?
What is the probability of randomly sampling 145 women 16 years of age or older and getting 35 or more who do volunteer work?
describe some of the issues or concerns at least three which would be addressed in deciding how to perform a
What decision would you recommend? (Hint: set up a payoff table, and remember that you want to minimize costs.) What is the expected value of perfect?
1. in a random sample of six microwave ovens the mean repair cost was 65.00 and the standard deviation was 11.50.
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