Alternate hypothesis for a one-sided test
It is claimed that in a bushel of peaches, less than ten percent are defective. A sample of 400 peaches is examined and 50 are found to be defective. What is the alternate hypothesis for a one-sided test?
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Is there any evidence that the average of the refrigerators sold per store was significantly more or less than 50 (Find the mean first and make sure that you formally state the null and alternate hypotheses)
Determine the sample size needed to reject Ho if the ratio is 3 times the hypothesized value of 2 variances, alpha = 0.05, beta = 0.10, R=3.
Suppose that during a manufacturing process a certain proportion of the products are flawed and have to be rejected by quality control.
Describe the sign test. What types of hypotheses is it used to test? What is the underlying concept?
To test for a disease that has a prevalence of 1 in 100 in a population, blood samples of 10 individuals are pooled and the pooled blood is then tested. What is the probability that the test result is negative (the disease is not present in the po
According to the Insurance Institute of America, a family of four spends between $400 and $3,800.00 per year on all types of insurance. Suppose the money spent is uniformly distributed. What is the standard deviation of the amount spent
The mean incubation time for a type of fertilized egg kept at 100.3 F is 23 days. Suppose that the incubation times are approximately normally distributed with a standard deviation of 2 days?
A student encounters an animal embryo at the eight-cell stage. The four smaller cells that comprise one hemisphere of the embryo seem to be rotated 45 degrees and lie in the grooves between larger, underlying cells (spiral cleavage).
The Qwik Market & Branding Company has found the following results of married people in a taste test of a popular high energy drink. Given that a husband prefers the drink, what is the probability his wife prefers the energy drink?
The national Academy of science reported in a 1997 study that 40% of research in mathematics is published by U.S.authors. The mathematics chairperson of a prestigious university wishes to test the claim that this percentage is no longer 40%.
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