Case Problem 2 Ethical Behavior of Business students at Bayview University All | Internet | Exam | Collaborated | Cheater | Y | 23 | 16 | 23 | 48 | N | 67 | 74 | 67 | 42 | Total | 90 | 90 | 90 | 90 | Proportion Y | 25.6% | 17.8% | 25.6% | 53% | Proportion N | 74.4% | 82.2% | 74.4% | 47% | | | | | | | | Male | Internet | Exam | Collaborated | Cheater | Y | 16 | 9 | 13 | 27 | N | 31 | 38 | 34 | 20 | Total | 47 | 47 | 47 | 47 | Proportion Y | 34.0% | 19.1% | 27.7%
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Study Set for Midterm II‚ Chapters 7 & 8 ESSAY. Write your answer in the space provided or on a separate sheet of paper. 1) The average score of all pro golfers for a particular course has a mean of 70 and a standard deviation of 3.0. Suppose 36 golfers played the course today. Find the probability that the average score of the 36 golfers exceeded 71. 2) At a computer manufacturing company‚ the actual size of computer chips is normally distributed with a mean of 1 centimeter
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Question 1 of 1: Interpreting the Confidence Interval Solve the following problems: A simple random sample of 40 salaries of NCAA football coaches has a mean of $415‚953 and a standard deviation of $463‚364. Construct a 95% confidence interval estimate of the mean salary of an NCAA football coach. 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
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calculated in order to obtain a point estimate of the mean overpayment. The estimated mean is then extrapolated to the overpayment amount to the population of all 1‚000 claims. http://pages.wustl.edu/montgomery/lecture-7 Point Estimate vs. Interval Estimate To estimate population parameters‚ statisticians use sample statistics. For example‚ we use sample means to estimate population means and we use sample proportions to estimate population proportions. An estimate of a population parameter
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Statistics Math 1342 Final Exam Review Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Provide an appropriate response. 1) A card is drawn from a standard deck of 52 playing cards. Find the probability that the card is an ace or a heart. 17 7 3 4 A) B) C) D) 52 52 13 13 Answer: D 2) The events A and B are mutually exclusive. If P(A) = 0.7 and P(B) = 0.2‚ what is P(A or B)? A) 0.5 B) 0.9 C) 0.14 D)
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Confidence intervals and prediction intervals from simple linear regression The managers of an outdoor coffee stand in Coast City are examining the relationship between coffee sales and daily temperature. They have bivariate data detailing the stand ’s coffee sales (denoted by [pic]‚ in dollars) and the maximum temperature (denoted by [pic]‚ in degrees Fahrenheit) for each of [pic] randomly selected days during the past year. The least-squares regression equation computed from their data
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Reflective Writing Tips Reflective writing is where you revisit experiences and write down your thoughts about them‚ asking questions such as: • "What did I notice?" • "Why did it happen this way?" • "How was I changed by this?" • "What might I have done differently?" • "How could I have handled the situation differently in hindsight?" • " What have I learnt about myself?" • " How do I interact in a team?" • "How did I feel?" • "Why did I react the way I did?" • "How can I improve
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that corresponds to a 94% level of confidence. A. 1.88 B. 1.66 C. 1.96 D. 2.33 2. In a sample of 10 randomly selected women‚ it was found that their mean height was 63.4 inches. Form previous studies‚ it is assumed that the standard deviation‚ σ‚ is 2.4. Construct the 95% confidence interval for the population mean. A. (61.9‚ 64.9) B. (58.1‚ 67.3) C. (59.7‚ 66.5) D. (60.8‚ 65.4) 3. Suppose a 95% confidence interval for µ turns out to be (120‚ 310)
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summarizes your assessment of the nature of cheating by business students at Bayview University. Be sure to include the following questions. 1. Develop 95% confidence intervals for the proportion of all students‚ the proportion of male students‚ and the proportion of female students who were involved in some type of cheating. 2. Conduct a hypothesis test to determine if the proportion of business students at Bayview University who were involved in some type of cheating is less than that of business
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34:337–347 DOI 10.1007/s10979-009-9192-x ORIGINAL ARTICLE The Effect of Retention Interval on the Confidence–Accuracy Relationship for Eyewitness Identification James Sauer Æ Neil Brewer Æ Tick Zweck Æ Nathan Weber Published online: 22 July 2009 Ó American Psychology-Law Society/Division 41 of the American Psychological Association 2009 Abstract Recent research using a calibration approach indicates that eyewitness confidence assessments obtained immediately after a positive identification decision provide
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