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A certain type of seed has always grown to a mean height of 8.5 inches. A sample of 49 seeds grown under new conditions has a mean height of 8.8 inches and a standard deviation of 1 inch.
(a) At the 5 % significance level, test the hypothesis that the new conditions grow no better plants.
(b) Graph the power function of this test.
an observational study is conducted to compare experiences of men and women between the ages of 50-59 years following
The mean annual salaries paid to male and female employees of the company were EURO 32.000,- and 24.000,- respectively. Determine the percentage of males and females employed by the company.
Assuming that 6 in 10 automobile accidents are due mainly to a speed violation; find the probability that among 8 automobile accidents 6 will be due mainly to a speed violation
a sample survey at a super market showed that 204 of 300 shoppers regularly use coupons. use the large- sample
Decide whether each of the following statements is worded correctly for the confidence interval, and fill in the blanks for the correctly worded one(s).
What does this story say about hypothesis testing and research? What is the likelihood of this happening? There are number of safeguards in place so this should not happen.
what is confidence interval in statistics? please give an example.could anyone help me this
The following table is from the Social Security Actuarial Tables. For each age, it gives the probability of death within one year, the number of living out of an original 100,000 and the additional life expectancy for a person of that age.
A regional manager visits local fast-food franchises and evaluates the speed of the service. If the manager receives her meal within 45 seconds, the server is given a free movie-admission coupon.
Suppose that one in 200 long-distance telephone calls is misdirected. What is the probability that at least one in five attempted telephone calls reaches the wrong number?
In the past, Judy Holmes's tire dealership sold an average of 1,000 radials each year. In the past two years, 200 and 250, respectively, were sold in fall, 350 and 300 in winter, 150 and 165 in spring, and 300 and 285 in summer.
the standard deviation of a normal random variable is 20. if a sample of 225 is selected out of a large population what
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