SAT

SAT, 04.09.2019 17:10, yaya111601

Mr. battles raised all of his students' scores on a recent exam by 555 points. what effect did this have on the mean and standard deviation of the scores?

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Mathematics, 14.07.2019 16:50, grayfaith16

Mr. battles raised all of his students' scores on a recent exam by 5 points. what effect did this have on the mean and standard deviation of the scores?

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Mathematics, 26.08.2019 18:30, destanybrunson

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Scores on a recent national statistics exam were normally distributed with a mean of 80 and a standard deviation of 6. a. what is the probability that a randomly selected exam will have a score of at least 71? b. what percentage of exams will have scores between 89 and 92? c. if the top 2.5% of test scores receive merit awards, what is the lowest score eligible for an award? d. if there were 334 exams with scores of at least 89, how many students took the exam? e. what is the median of the population of the recent national statistics exam?

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Mathematics, 06.11.2019 03:31, alyxxboothe

The sat and act college entrance exams are taken by thousands of students each year. the mathematics portions of each of these exams produce scores that are approximately normally distributed. in recent years, sat mathematics exam scores have averaged 480 with standard deviation 100. the average and standard deviation for act mathematics scores are 18 and 6, respectively. an engineering school sets 550 as the minimum sat math score for new students. what percentage of students will score below 550 in a typical year?

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