A tutor for the SAT exam claims that his students have an average score higher than 1020. A sample o
Question: A tutor for the SAT exam claims that his students have an average score higher than 1020. A sample of 20 of his students had a mean score 1040 with a standard deviation of 207. At the alpha = .05 significance level, do we reject or not reject the null hypothesis?
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[Solved] A psychologist claims that the mean age at which children being walking is 12.5 months. To test this #5822
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[Solved] What percentage of a normal distribution is within 2 standard deviations of the mean? (Select the cl #28748
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[Solution] Use a normal approximation to the binomial distribution to find the probability of tossing more than #22071
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[Solution] The director of admissions at Kinzua University in Nova Scotia estimated the distribution of student #7299
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