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Mathematics, 30.07.2020 06:01 daylanhampton
Because 2 is the greatest integer not greater than 2.4 and โ3 is the greatest integer not greater than โ2.4. Because 2.4 rounds to 2, and โ2.4 rounds to โ3. Because 2.4 is positive and โ2.4 is negative, they are rounded in different ways. Because 2.4 and โ2.4 are both divisible by 2 and by 3, the value of each expression can be ยฑ2 or ยฑ3.
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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 ยต = 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 ยต = 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 (ยฑ 1)?
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Because 2 is the greatest integer not greater than 2.4 and โ3 is the greatest integer not greater th...
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