Mathematics, 30.03.2021 23:10 Jakyramason
An SRS of 400 high school seniors gained an average of ¯=21 points in their second attempt at the SAT Mathematics exam. Assume that the change in score has a Normal distribution with standard deviation =48. You can find the critical values to three decimal places by using the last row in table C. (a) Find a 95% confidence interval for the mean change in score in the population of all high school seniors. (Enter your answers rounded to two decimal places.)
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