Arecord book has 3 confidence intervals listed (2,3) (1,2), and (1.5, 3.) for the samwe parameter. the scientist was told one of them was record from a faulty instrument, the 2nd a 95% confidence interval and the 3rd a 99% confidence interval. but they don't know which is which. which of the following is true?
o (1,2) is 99% ci, (2,3) is 95% ci, (1.5, 3.5) is the error
o (2,3) is 99% ci, (1.5,3.5) is 95% ci, (1,2) is the error
o (2,3) is 95% ci, (2,3) is 95% ci, (1,2) is the error
o (1,2) is 95% ci, (2,3) is 99% ci, (1.5, 3.5) is the error

There are two major tests of readiness for college: the act and the sat. act scores are reported on a scale from 1 to 36. the distribution of act scores in recent years has been roughly normal with mean µ = 20.9 and standard deviation s = 4.8. sat scores are reported on a scale from 400 to 1600. sat scores have been roughly normal with mean µ = 1026 and standard deviation s = 209. reports on a student's act or sat usually give the percentile as well as the actual score. the percentile is just the cumulative proportion stated as a percent: the percent of all scores that were lower than this one. tanya scores 1260 on the sat. what is her percentile (± 1)?