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A researcher conducts an independent measures research study and obtains t= 2.070 with df= 28
a. How many individuals participated in the entire research study?b. Using a two-tailed test with a=.05, is there a significant difference between the two treatment conditions?c. Compute r squared to measure the percentage of variance accounted for by the treatment effect.
Find the probability that the average diameter of those sand dollars is more than 4.13 centimeters. Assume that the variable is normally distributed.
The probability of going to college is 0.4. What is the probability that the proportion of women who go to college is greater than 50%.
Show that marginal cost and marginal revenue are given by? Show that the profit maximizing quantity which equates marginal revenue and marginal cost is?
Suppose you take a random sample of 15 bearings and compute xbar = 8.2535. What is the probability that you will see a sample mean greater than xbar?
In the FBI promotion system, last year's decoration points had a standard deviation equivalent to 7.1. This year 27 of the tested individuals had scores with a standard deviation of 4.2.
One of the statistics collected is the porportion of time employees forget to include a napkin in the bag. What is the probability that there is no napkin included for a given order?
Will the sum of squared deviation scores be greater for the test or the exam (assume the same number of people sat both the test and the exam)? Why?
Describe a business situation where you would want to use a t-test. Why would you choose that test? What would you expect to show by doing this?
To test whether or not there is a difference between treatments A, B, and C, a sample of 12 observations has been randomly assigned to the 3 treatments. You are given the results below.
Find the probability that 665 or fewer college students in the sample send and receive text messages with their phones? Is this result unusual?
Find the most appropriate statistical procedure: Teacher of low-level reading group interested in average score for group of 25 students?
The 'interaction effect' was also important. By using the means in the table above write a statement explaining how the anti-anxiety drug appears to affect anxiety. Are the outcomes consistent with the hypothesis proposed by the researchers?
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