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Question: A local hotel offers ballroom dancing on Friday nights. A researcher observes the customers and estimates their ages. Discuss the skewness of the distribution of ages if the mean age is 51, the median age is 54, and the modal age is 59.
To reduce the standard deviation of the binomial distribution by half, what change must be made in the number of trials?
a statewide real estate agency old colony specializes in residential home sales in nothern pa. records indicate the
One hundred men who are observed buying a disposable razor are selected and asked to participate in a shaving study.- Describe the population and the sample in this problem.
How would to solve this statistics question. In a gallop pill of 1,038 adults ,540 said that second-hand smoke is very harmful. What percentage of adults who said second-hand smoke is very harmful?
At the 0.10 level of significance, test the null hypothesis that the population variances are equal. Would your conclusion be different if the test had been conducted at the 0.05 level? At the 0.02 level?
One suggested environmental determinant of pediatric lung function is the level of cigarette smoking in the home. A researcher wants to do a pilot study with two groups:
1. of 1906 people who came into a blood bank to give blood 300 people had high blood pressure. estimate the probability
1.a radio station wants to know if residents in their area are in favor of a proposed tax increase. they invite
For this example, what specific test might you use to test whether the average number of offspring has changed over the years? Why would you use this specific type of test? Describe a brief scenario where you may need to use nonparametric statistic..
the data in table are a sample of the cycle time in days to process and pay employee health insurance claims in a
the population mean annual salary for flight attendants is 56275. a random sample of 48 flight attendants is selected
If two detection systems are installed in the same area and operate independently, what is the probability that at least one of the systems will detect the attack?
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