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Jimmy's Electric Products assembles components for cell phones. For the last 10 days Mark has averaged 9 rejects per day, with a std. dev. of 2 rejects per day, while Debbie has averaged 8.5 rejects per day with a std. dev. of 1.5 rejects per day, over the same period. At the 0.05...
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5. The owner of Giant Fish supermarket has asked you to use a sample of 8 customers to determine if a television commercial affects the likelihood of purchasing a new brand of fish sauce. The customers selected rated the purchase potential of the new brand of sauce both before and after seeing a...
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4. Suppose the manufacturer of Advil, a common headache remedy, recently developed a new formulation of the drug that claimed to be more effective. To evaluate the new drug, a sample of 200 current users is asked to try it. After a one month trial, 180 indicated that the new drug was more...
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The owner of Big Fish supermarket was reviewing some data from a research report on the type of advertisements in the local paper that are most effective. Three types of ads (big headline, straight forward and bold print) were randomly alternated over a period of weeks and the number of shoppers...
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A history class is comprised of female and male students. If the instructor of the class randomly chooses students from the class for an oral exam, what is the probability that female students and male students will be selected? Round your answer to decimal places
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A history class is comprised of 5 female and 8 male students. If the instructor of the class randomly chooses 9 students from the class for an oral exam, what is the probability that 2 female students and 7 male students will be selected? Round your answer to 3 decimal places
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-.87<z<1.93
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define what is meant by the process of model enrichment
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an election poll reported that a candidate has an approval rating of 54% with a margin of error of 4%. Construct a confidence interval for proportion of adults who approve of the candidate
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I have a case due tomorrow and was looking for someone to help me out on the last section. I have the questions and all of the answers attached. Please check over the questions and correct any errors and help me with the last question, the one page write up. Let me know what this will cost....
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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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