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Question: (Please show your work by making a table for d and d-square)
A motivational program was designed to increase the number of hours each student who took it studied per week. Eight randomly selected students were involved in the program. The table below shows the number of hours each student studied per week before the taking motivational program and after taking the program.
Before program: 8 12 10 12 5 10 10 12
After program: 12 11 14 15 8 15 9 6
At the 10% level of significance, can it be concluded the motivational program increased the average number of hours students studied per week?
Write down the null and alternate hypotheses. Formulate and test the appropriate hypotheses. Use the critical value approach.
Assume that the population of paired differences has a normal distribution.
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Robinson & Associates performs employment screening for large companies in southern California. It usually follows two-step process. First potential applicants are given a test that covers basic knowledge and intelligence. If applicants score b..
An urn contains θ black balls and N - θ white balls. A sample of n balls is to be selected without replacement. Let Y denote the number of black balls in the sample. Show that (N/n)Y is the method-of-moments estimator of θ.
Select a strati?ed random sample that uses full-time and part-time students as the two strata and that includes 10 students from each stratum. Describe the procedure you used to select the sample, and identify the students included in your sample..
suppose we generate a random variable x in the following way. first we flip a fair coin. if the coin is heads take x to
a consumer research firm wants to compare three brands of radial tires xyand z in terms of tread life ofer different
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What can producers, sales agents, distributors and wholesalers do to counteract retailer dominance within the channels of distribution?
At 99% confidence, test to determine if there is sufficient evidence to indicate that process 2 takes a significantly longer time to manufacture the Zip drives.
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