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A group of professors investigated first-year college students' knowledge of astronomy. One concept of interest was the Big Bang theory of the creation of the universe. In a sample of 144 freshmen students, 31 believed that the Big Bang theory accurately described the creation of planetary systems. Based on this information, is it correct at the a = 0.10 level of significance to state that more than 20% of all freshmen college students believe the Big Bang theory describes the creation of planetary systems?
Find the test statistic
Z=
Determine the rejection region
Z<-1.645
Z>1.28
Z>1.28 or Z<-1.28
Z>1.645 or Z<-1.645
Z>1.645
do the calculations. Show all your steps. P(B/A) = P (B1/A1) * P (B2/A2) * P(B3/A3). Evaluate the employer's knowledge of his/her employees.
A random sample of 12 equal-sized stores is selected. Some calculations have been done for you: SSx = 400, SSy = 3.0025 and SSxy = 28. What is the value of the sample correlation coefficient?
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Fuji Importers' tubes are 4 percent defective, Kirkpatricks' 7 percent, and Parts, Inc. are 6.5 percent defective. (a) What is the overall percent defective?
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What is the smallest sample size needed to estimate the mean amount reimbursed to within 50 cents with 90% confidence, if a preliminary study indicates that the sample standard deviation of all amounts reimbursed is $3.00
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What is the probability that none are a commercial success?
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