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(Solved): 9. Consider the following table that lists SAT scores before and after a sample of five students to ...
9. Consider the following table that lists SAT scores before and after a sample of five students took a preparatory course. Assume that the SAT scores are approximately normally distributed. Is there good evidence that the preparatory course improves the SAT scores. Given a significance level .
9. Consider the following table that lists SAT scores before and after a sample of five students took a preparatory course. Assume that the SAT scores are approximately normally aıstributed. Is there good evidence that the preparatory course improves the SAT scores. Given a significance level .
Expert Answer
Sol) Step: 1 1: Population mean of the first sample: SAT score after the course 2: Population mean of the second sample: SAT score before the course Null hypothesis: Mean Sat Score After the course - Mean Sat Score Before score = 0; The the preparatory course has no effect Alternate Hypothesis: Mean Sat Score After the course -Mean Sat Score Before score > O preparatory course help to improve the SAT scoresd: Sat Score after the course - Sat score before the course