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Of 970 subjects, 20 answered yes and 950 answered no.
a. find p^, the proportion of the sample who were victimsb.find the standard error of this estimatec.find the margin of error for a 95% confidence interval for the population proportiond.construct the 95% confidence interval for the population proportion
Based on surveys conducted in 1989 and 1999, a researcher compared the proportion of high school age females interested in a career in science in 1989 with the proportion in 1999. He concluded that the proportions were not significantly different ..
Compare the effectiveness of three methods of teaching (IV). You plan to administer a standardized test (DV measured on an interval scale measuring knowledge acquisition) to the students in three classes with each class using a different teaching ..
An article in Baltimore Sun claimed that the typical supermarket trip takes a mean of 22 minutes. Suppose that in an effort to test this claim, you select a sample of 50 shoppers at a Baltimore City Giant.
A store selling newspapers orders only x=4 of a certain newspaper because the manager does not get many calls for that publication. If the number of requests per day follows a Poisson distribution with mean 3.
The Warren County Telephone Company claims in its annual report that "the typical customer spends $70 per month on local and long-distance service.
If the manufacturer sells the parts in packages of 10 parts, what are the mean and standard deviation of the numberof useable parts in a package?
Perform Repeated Measures ANOVA also calculate PRE. An educational study uses a simple pre-post design to assess the value of a computer tutor for solving inequalities.
An auditor reviewed 25 oral surgery insurance claims from a particular surgical office, determining that the mean out-of-pocket patient billing above the reimbursed amount was $275.66 with a standard deviation of $78.11.
Find a 95% confidence interval for the proportion p of the inner-city, working-class group who eventually became alcoholics.
Why is expectation important? Explain what the expected value of an experiment or a business represents. What does it mean to have an expected value of 0? Provide an example of expectation and the use of the formula for expected value.
You can allow the cup to overfill 4% of the time. What amount should you set as the mean amount of coffee to be dispensed?
Set up the null and alternative hypotheses for testing these claims. In order to conduct the test, the customer selected a significance level of alpha=.05. Interpret this value. (I.e. what does it mean to conduct the test at a level of alpha=.05)
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