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A Federal Trade Commission study of the pricing accuracy of electronic checkout scanners at store found that one in every 30 items is priced incorrectly. Suppose the FTC randomly selects 5 items at a retail store and checks the accuracy of the scanner price of each. Let x represent the number of the five items that is priced incorrectly.
1.) Use the information in the FTC study to estimate p for the binomial experiment.2.) What is the probability that exactly one of the five items is priced incorrectly by the scanner?3.) What is the probability that at least one of the five items is priced incorrectly by the scanner?
Average of this group is 229. Population standard deviation for both groups is 6. At α = 0.01, is there difference in cholesterol levels between two groups?
A farmer in Iowa owns 45 acres of land. He is going to plant each acre with wheat or corn. Each acre planted with wheat yields $200 profit, requires 3 workers, and requires 2 tons of fertilizer; each with corn yields $300 profit, requires 2 worker..
If the writing scores for the population have a standard deviation of σ = 20, does the sample provide enough evidence to conclude that the new composition course has a significant effect?
Write up your results by using scientifically recognized form.
Checking the output by almost continuous sampling since the abnormal condition began. What is the probability that in a sample of 10 pieces: Exactly 5 will be defective?
Determine the P value for the indicated hypothesis test with given standardized test statistic, z. Make decision whether to reject H0 for given level of significance deviation.
Would you expect the mean absolute percentage error to be more than or less than 0.25? Describe.
The participants in a television quiz show are picked from a large pool of applicants with approximately 60% men and 40% women. X is a random variable that gives the number of females chosen when ten participants are picked randomly.
Your fixed costs are presently $500,000 with a variable cost per unit of $25 per unit and a sales price of $43 Your options are: Increase your fixed costs by $50,000 which will decrease variable costs by $8 per unit.
At the .05 significance level, is there a difference in the mean number of miles traveled per month between Cincinnati and Pittsburgh employees? Use the five-step hypothesis-testing procedure.
What is the probability that the mean weight of sixteen randomly chosen men would exceed the individual weight from part (1)?
He is expected to satisfactorily service 10 patients per day at an hourly wage of $8. Which dental hygienist would be the better hire? Why?
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