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A town has 20, 000 registered voters, of whom 8,800 are democrats. A survey organization takes a simple random sample of 900 registered voters. The upper confidence limit of 95% interval for the sample percentage is what?
An alcohol awareness task force at Big-Ten university sampled 20 students after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying
For each of following data sets, select the most suitable response from choices below the table. A strong negative linear relation exists.
For each of the following studies, say whether you would use a t test for dependent means or a t test for independent means.
The evidence supports the manufactuer claim at the .05 significance level. Suppose 49 bulbs were tested with the folowing results: x-bar = 827.5 hours, s= 70 hours. Conduct the test using alpha=.05.
Record the type of research design used. True lab experiment, quasi-experiment, field experiment, or correlation design.
Four customers in succession come into the store to order stereos. The retailer is interested in their preferences. List the possibilities for preference arrangements among the four customers.
Determine the regression equation, letting the first variable be the independent (x) variable. Find the indicated predicted values.
What is the probability that the individual is a male - are enjoying shopping for clothing and the gender of the individual statistically independent? Explain.
Explain your answer to someone who is familiar with the T test for a single sample, but not with the T test independent means.
Evaluate this statement: "Without good measurement, statistical analysis is worthless." Do you believe it is an overgeneralization.
Find the test statistic, p-value and critical value and state a final conclusion. Sample data: n=40, mean of the values in a sample = 117, assume that the standard deviation = 14 and the significance level = 0.05
Assume that the two tests use different scales to measure the same aptitude. If a woman gets a SAT score of 1220, find her equivalent ACT score.
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