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Elijah wants to know whether textbook costs are different for different course...
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Elijah wants to know whether costs are different for different courses of study. He selects a random sample of 33 sociology textbooks offered on a popular online site. The mean price of his sample is $74.64 with a standard deviation of $49.36. He then selects a random sample of 33 math and science textbooks from the same site. The mean price of this sample is $111.56 with a standard deviation of $66.90. What is the t-critical value? Use the Student t-table from the
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