Mathematics

Mathematics, 30.11.2019 01:31, letyourmemesbedreams

Aclass of 28 students has 7 juniors and 21 seniors. the average (arithmetic mean) score of the juniors on a test was 73. the average score of the seniors on the test was y. the average score of the entire class on the test was 85. find y.

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Mathematics, 12.07.2019 03:00, aguerobia

Aclass in advanced physics is composed of 10 juniors, 30 seniors, and 10 graduate students. the final grades show that 3 of the juniors, 10 of the seniors, and 5 of the graduate students received an a for the course. if a student is chosen at random from this class and is found to have earned an a, what is the probability that he or she is a senior?

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Mathematics, 03.08.2019 04:00, kamarprofit88

Twenty-five juniors from a university volunteer to allow their math gre test scores to be used in a study. these 25 juniors had a mean math gre score of 450. suppose we know that the standard deviation of the population of math gre scores for juniors at the university is σ = 100. assuming the population of math gre scores for juniors at the university is approximately normally distributed, a 90% confidence interval for the mean math gre score μ for the population of juniors computed from these data is

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Mathematics, 09.10.2019 16:30, shukriabdisabrie

The scores on a test given to all juniors in a school district are normally distributed with a mean of 75 and a standard deviation of 7. find the percent of juniors whose score is no more than 89. the percent of juniors whose score is 89 or below is %

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Mathematics, 03.12.2019 05:31, lex2678

Suppose that 250 students take a test, of which 100 are sophomores, 140 are juniors and 110 are seniors. let x be the random variable representing the score of each student on the test. suppose that the sophomores have an average of 60 juniors have an average of 67 and the seniors have an average of 77. find e(x) using conditioning. use the appropriate notation to explain your answer.

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Aclass of 28 students has 7 juniors and 21 seniors. the average (arithmetic mean) score of the junio...

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