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If 4% of the population carries a certain genetic trait, find the probability that in a sample of 100 people, there are exactly 8 people who have the trait. Assume the distribution is approximately Poisson.
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The average salary of a group of sales people is $32,500 with a standard deviation of $2,500. Answer the following: 1. How much would a salesperson make if he/she is 2 standard deviations above the mean? __________ 2. If a person makes $28,000, about how many...
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The data in the Excel spreadsheet attached indicate the selling prices of houses located on corner lots ("corner-lot houses") and of houses not located on corner lots. Conduct a one sided hypothesis test of the claim that corner-lot houses have higher average selling prices...
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a researcher conducted a study to record the colors of students' eyes. the appropriate measure(s) of central tendency is (are): a. the mode b. the median c. the mean d. both the mode and the median --------------------------------------------------------------------------------
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what is the probability that i will ace this quiz? I mean. I did study awfully hard for it.
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the percent defective for parts produced by manufacturer is targeted to at 4% the process is monitored daily by taking samples of n=160, today the number of defective parts were 17 what would be a 95% confidence interval for proportion defective ?
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f(x,y)=6xy^2 0<x<1, 0<y<1 find P(x+y>1)
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Raul received a score of 77 on a history test for which the class mean was 70 with standard deviation of 10. He received a score of 70 on a biology test for which the class mean was 70 with standard deviation of 4. On which test did he do better relative to the rest of the class?
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An inspector inspects large truckloads of potatoes to determine the proportion p in the shipment with major defects prior to using the potatoes to make potato chips. Unless there is clear evidence that this proportion is less than 0.10, she will reject the shipment. To reach a decision, she...
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Do top business executives tend to vote Republican? A random sample of 90 CEOs were asked which party they voted for in the last presidential election. Fifty of the CEOs stated that they voted Republican. How large a sample n would you need to estimate p with margin of error 0.01 with...
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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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