Suppose that the population of the scores of all high school seniors who took the SAT Math (SAT-M)test this year follows a Normal distribution with standard deviation $\sigma$= 100.You read a report that says,"On the basis of a simple random sample of 100 high school seniors that took the SAT-M test this year,a confidence interval for $\mu$ is found to be 512.00 ± 25.76." What was the confidence level used to calculate this confidence interval?
A)90%
B)95%
C)99%
D)99.9%

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The Answer of Suppose that the population of the scores of all high school seniors who took the SAT Math (SAT-M)test this year follows a Normal distribution with standard deviation $\sigma$= 100.You read a report that says,"On the basis of a simple random sample of 100 high school seniors that took the SAT-M test this year,a confidence interval for $\mu$ is found to be 512.00 ± 25.76." What was the confidence level used to calculate this confidence interval?
A)90%
B)95%
C)99%
D)99.9%

Suppose That the Population of the Scores of All High σ\sigmaσ

Suppose That the Population of the Scores of All High $\sigma$