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Suppose that appropriate random sampling has been completed and that all conditions are met. Suppose further that 50 out of 80 men tested preferred the product while 43 out of 80 females preferred it. Compute the test statistic and use technology to find the corresponding p-value based on this test.
Create an research question, and then state the experimental and null hypotheses. Then, explain why null and alternative hypotheses have to be mutually exclusive. Finally, discuss how Type I and Type II errors are related to your hypotheses.
A student with a 3.5 to 4 grade point average who took standardized test is randomly selected. Determine the probability that students test score is less than 36.
A study was conducted of the annual incomes of beginning probation officers in metropolitan areas of less than 100,000 population and in metropolitan areas having more than 500,000 population.
How many degrees of freedom should the researcher use in her t-test critical value assuming that the variances are equal?
He would like to estimate with .05 of the true proportion with a confidence level of 90%. What is the sample size needed?
What is the approximate permutation test P-value and What is the permutation test P-value for testing the equality of the means versus the hypothesis that the mean change for the treatment group is larger than the mean treatment for the control gro..
From time to time, one branch office of a company must make shipments to a certain branch office in another state. There are three package delivery services between the two cities where the branch offices are located.
If the test is positive, what is the probability that this person actually has heart disease?
The mean of a normal probability distribution is 60; the standard deviation is 5.
Jasmine is an African American graduate student. She is conducting research on the effects that affirmative action programs have had on American corporations.
Find a 99% confidence interval for the difference in the mean number of calls between night and day.
A University Web server has five main components each with the same reliability. All five components must work for the server to function as intended.
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