Question: 3. An aptitude test has been given over the past many years with a mean performance of 90. A group of 30 students are preparing

3. An aptitude test has been given over the past many years with a mean performance of 90. A group of 30 students are preparing for this test and are taught with special emphasis on remedial reading. The 30 students obtain an average of 94.2 with a sample standard deviation of 8.5. Has the remedial reading emphasis helped (at the 1% level of significance)?

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