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You may have heard the old adage, "Stay with your first answer on a multiple-choice test." Is changing answers more likely to be helpful or harmful? To examine this, Best (1979) studied the responses of 261 students in an introductory psychology course. He recorded the number of right-to-wrong, wrong-toright, and wrong-to-wrong answer changes for each student. More wrong-to-right changes than right-to-wrong changes were made by 195 of the students, who were thus "helped" by changing answers; 27 students made more right-to-wrong changes than wrong-to-right changes and thus "hurt" themselves.
(a) For these 222 students, conduct a X2 test of the hypothesis that the population proportions of right-to-wrong and wrong-to-right changes are equal. Your conclusions?
(b) What is the effect size?
A population of data from a paper supply company is known to have a mean weight of 55 ounces per ream and a population standard deviation of 5 ounces. The population is known to be bell shaped and symmetrical.
Provide Statistical analysis plan and Protocol and eCRL - You need to prepare 20 listing from 20 different SAS data set - . Provided written informed consent
1. How do we calculate the standard error of the mean? a. Sample standard deviation divided by square root of sample size b. Square root of sample variance
What is the expected number of CPA financial advisors that have an average client size between $500,000 and $1 million?
steve and his friends are relaxing at a local tavern. the number of drinks that steves table receives is poisson
A U.S. Bureau of Labor Statistics survey showed that one in five people 16 years of age or older volunteers some of his or her time.
Historically, 70% of your customers at Rodale Emporium pay for their purchases using credit cars. In a sample of 20 customers, find the probability that
Minying hasjust bought a single share of stock from DA Corporation for $50, and she is considering buying a put option for the stock, which would cost her.
(b) Would it still be an interval scale if we multiplied each score by 10? Explain.
When would you use a hypothesis test for the difference in two population proportions at your place of employment, in your education, or in politics?
The Institute for Operations Research and the Management Sciences
He must choose four of the six courses available in his major discipline and three of the four courses offered in related subjects - In how many ways can Prashad list his course choices? Explain the reasoning for your answer.
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