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Based on the performance of all individuals who tested between July 1, 2014 and June 30, 2017, the GRE Quantitative Reasoning scores are normally distributed with a mean of 152.8 and a standard deviation of 9.13. (https://www.ets.org/s/gre/pdf/gre_guide_table1a.pdf). Show all work.
Just the answer, without supporting work, will receive no credit.
(a) Consider all random samples of 36 test scores. What is the standard deviation of the sample means? (Round your answer to three decimal places).
(b) What is the probability that 36 randomly selected test scores will have a mean test score that is between 150 and 155? (Round your answer to four decimal places).
(c) To get the answer for part (b), what technology did you use? If an online applet was used, list the URL and describe the steps. If a calculator or Excel was used, write out the function.
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