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The officers of president,vice president,secretary,and treasurer for an enviromental club will be filled from a pool of 14 candidates. Six of the candidates are members of the debate team. (1) What is the probablity that all of the offices are filled by members of the debate team? (2) What is...
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A researcher theorized that people can hear better when they have just eaten a large meal. Six individuals were randomly assigned to eat either a large meal or a small meal. After eating the meal, their hearing was tested. The hearing ability scores (high numbers indicate greater ability) are...
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Refer to Data Set 4 in Appendix B and use the amounts of nicotine (mg per cigarette) in the king size cigarettes, the 100mm menthol cigarettes, and the 100mm non-menthol cigarettes. The king size cigarettes are non-filtered, non-menthol, and non-light. The 100mm menthol cigarettes are filtered...
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If the .99 confidence interval ranges from 25.5 to 35.5, which of the following null hypotheses would be rejected with a two tailed test at the .01 level of significance? a. 28 b. 25 c. 35 d. 30
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how find the wining number for maine lottery number
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A random sample of 10 companies in spring 2005 showed a sample average of $105 with a sample standard deviation equal to $32. A random sample of 10 different companies in spring 2006 resulted in a sample average of $75 with a sample standard deviation equal to $45.
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A carpal tunnel syndrome is a common wrist complaint resulting from a compressed nerve. Among various treatments, two are common: apply a splint or perform a surgery. In one randomized trial, 156 patients were identified as having the syndrome and were treated with one of either the splint or...
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Identify the sample space of the probability experiment: answering a multiple choice question with A, B, C, and D as the possible answers
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The midterm scores in Statistics 101 had a mean of 72 and an SD of 12. The exam scores in Psychology 101 had a mean of 72 and an SD of 20. For both exams, the scores followed the normal curve. Both instructors gave the top 10% of the scores A s, the next 25% B s, and the next 40% C s....
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Suppose you interview 10 randomly selected workers and ask how many miles they commute to work. You ll compute the sample mean commute distance. Now imagine repeating the survey many, many times, each time recording a different sample mean commute distance. In the long run, a histogram of these...
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- 1. A school administrator wonders if students whose first language is not English score differently on the math portion of the sat exam than students whose first language is English. The mean SAT math score of students whose first language is english is 516 on the basis of data obtained from the college board. A simple random sample of 20 students whose first language is not English result in a sample mean SAT math score of 522. SAT math score are normally distributed with a population standard deviation of 114. Why is it necessary for SAT math scores to be normally distributed to test the hypothesis?
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