Question 12 2 Pts Suppose That The Distribution Of The Scores Of All High School Seniors Who Took The Sat Math Sat M 1 (39.98 KiB) Viewed 27 times
Question 12 2 Pts Suppose That The Distribution Of The Scores Of All High School Seniors Who Took The Sat Math Sat M 2 (43.58 KiB) Viewed 27 times
Question 12 2 pts Suppose that the distribution of the scores of all high school seniors who took the SAT Math (SAT- M) test in Year 2015 is Normal with an unknown mean u and an unknown SD o. A random sample of 16 high school seniors that took the SAT-M test in Year 2015 has an average score of 512 and an SD of 80. Which of the following confidence intervals is the best 95% confidence interval for u? We should obtain a t confidence interval: 512 +2.131 * 20. We should obtain a z confidence interval: 512 + 1.96 * 20. * We should obtain a t confidence interval: 512 +2.131 * 80. o We should obtain a z confidence interval: 512 + 1.96 * 80.
Question 13 2 pts Suppose that the distribution of the scores of all high school seniors who took the SAT Math (SAT- M) test in Year 2010 is Normal with a mean of u and a standard deviation o=100. A random sample of 16 high school seniors that took the SAT-M test in Year 2010 has an average score of 512 and an SD of 120. Which of the following confidence intervals is the best 95% confidence interval for u? We should obtain at confidence interval: 512 +2.131 * 30. We should obtain a z confidence interval: 512 + 1.96 * 30. We should obtain a z confidence interval: 512 1.96 * 25. We should obtain a t confidence interval: 512 +2.131 - 25.
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