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The population of SAT scores forms a normal distribution with a mean of µ=500 and a standard deviation of o =100. If the average SAT score is calculated for a sample of n=25 students,
A. What is the probability that the sample mean will be greater than M=510. In symbols, what is p(M>510)?
B. What is the probability that the sample mean will be greater than M=520. In symbols, what is p(M>520)?
C. What is the probability that the sample mean will be between M=510 and M=520? In symbols, what is p(510<M<520)?
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Suppose that the population of heights of male college students is approximately normally distributed with mean m of 68 inches and standard deviation s of 3.75 inches. A random sample of 16 heights is obtained.
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At a college, 70 percent of the students are women and 35 percent of students receive grade of C. About 20 percent of students are neither female nor C students. Use this contingency table.
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Give the Z score for person who scores (a) 340, (b) 310, and (c) 260. Give the raw scores for persons whose Z score on this test are (d) 2.4, (e) 1.5, (f) o, and (g) -4.5
In a study designed to test the effectiveness of acupuncture for treating migraine, 142 subjects were treated with acupuncture and 80 subjects were given a sham treatment. The numbers of migraine attacks for the acupuncture treatment group had a m..
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