Mathematics, 24.06.2020 07:01 maddysmall32
A random sample of 60 mathematics majors spent an average of $200.00 for textbooks for a term, with a standard deviation of $22.50. A random sample of 40 English majors spent an average of $180.00 for textbooks that term, with a standard deviation of $18.30. Calculate a 90% confidence interval for the difference in average amounts spent on textbooks (math majors - English majors), assuming equal population variances.
Answers: 2
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A random sample of 60 mathematics majors spent an average of $200.00 for textbooks for a term, with...
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