Mathematics, 04.03.2020 05:38 lizzyhearts

An SRS of 350 high school seniors gained an average of ¯ x = 21 points in their second attempt at the SAT Mathematics exam. Assume that the change in score has a Normal distribution with standard deviation σ = 52 . (a) Find a 99 % confidence interval for the mean change in score μ in the population of all high school seniors. (Enter your answers rounded to two decimal places.) lower bound of confidence interval: upper bound of confidence interval:

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An SRS of 350 high school seniors gained an average of ¯ x = 21 points in their second attempt at th...