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STAT 200

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STAT 200 Quiz 2 NEW 1. (10 points) Once upon a time, I had a fast-food lunch with a mathematician colleague. I noticed a very strange behavior in him. I called it the Au-Burger Syndrome since it was discovered by me at a burger joint. Based on my unscientific survey, it is a rare but real malad..
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STAT 200 Week 2 HomeWork NEW 7. For the data from the 1977 Stat. and Biom. 200 class for eye color, construct:  a.       pie graph b.      horizontal bar graph c.       vertical bar g..
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STAT 200 Week 3 HomeWork NEW 7. You flip a coin three times. (a) What is the probability of getting heads on only one of your flips? (b) What is the probability of getting heads on at least one flip? 25. You are to participate in an exam for which you had no chance to study, and for that reaso..
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STAT 200 Week 4 HomeWork NEW 8. Assume the speed of vehicles along a stretch of I-10 has an approximately normal distribution with a mean of 71 mph and a standard deviation of 8 mph. a. The current speed limit is 65 mph. What is the proportion of vehicles less than or equal to the speed limit? b...
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STAT 200 Week 5 HomeWork NEW 5. When you construct a 95% confidence interval, what are you 95% confident about? 8. What is the effect of sample size on the width of a confidence interval? 11. A population is known to be normally distributed with a standard deviation of 2.8. Compute the 95%..
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STAT 200 Week 5 HomeWork NEW 4. Why is a 99% confidence interval wider than a 95% confidence interval? 10. The effectiveness of a blood-pressure drug is being investigated. How might an experimenter demonstrate that, on average, the reduction in systolic blood pressure is 20 or more? 12. A ..
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STAT 200 Week 6 HomeWork NEW Lane Chap. 11 18. You choose an alpha level of .01 and then analyze your data. a. What is the probability that you will make a Type I error given that the null hypothesis is true? b. What is the probability that you will make a Type I error given that the nul..
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STAT 200 Week 7 HomeWork NEW Lane Chap. 14 2. The formula for a regression equation is Y’ = 2X + 9. a. What would be the predicted score for a person scoring 6 on X? b. If someone’s predicted score was 14, what was this person’s score on X?  6. For the X, Y data below, compute: ..
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STAT 200 Week 8 HomeWork NEW Lane Chap. 15 10. If an experiment is conducted with 5 conditions and 6 subjects in each condition, what are dfn and dfe? 17. The following data are from a hypothetical study on the effects of age and time on scores on a test of reading comprehension. Compute th..
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