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1. Fish Oil and Blood Pressure. Find the 95% confidence interval and one-sided p-value asked for in Exercise 13(e) and (g) but use a statistical computer package to do so.
2. Auto Exhaust and Lead Concentration in Blood. Researchers took independent random samples from two populations of police officers and measured the level of lead concentration in their blood. The sample of 126 police officers subjected to constant inhalation of automobile exhaust fumes in downtown Cairo had an average blood level concentration of 29.2 !g/dl and an SD of 7.5 !g/dl; a control sample of 50 police officers from the Cairo suburb of Abbasia, with no history of exposure, had an average blood level concentration of 18.2 !g/dl and an SD of 5.8 !g/dl. (Data from A.-A. M. Kamal, S. E. Eldamaty, and R. Faris, "Blood Lead Level of Cairo Traffic Policemen," Science of the TotalEnvironment 105(1991): 165-70.) Is there convincing evidence of a difference in the population averages?
assume you have applied for two jobs a and b. the probablility that you get job a is .13. the probability of being
an insurance company receives 100 claims per day on average. claims arrive independently and at random at the company
You have been called upon to assess whether a NICU nutrition protocol is working to promote growth in underweight babies. You have weight measurements at three time points: birth, 28 days and discharge from the hospital. You also have a variable i..
The Greenfield Service Company's marketing director is interested in analyzing the relationship between her company's sales and the advertising dollars spent. In the course of her analysis, she selected a random sample of 20 weeks and recorded..
a university has 1000 computers available for students to use. each computer has an 850-gigabyte hard drive. the
Two years ago, a survey of all Wal-Mart customers indicated that the mean number of items bought per day by male customers was 8.3 with a standard deviation of 3.7.
An advertising agency that serves a major radio station wants to estimate the mean amount of time that the station's audience spends listening to the radio daily. From past studies, the standard deviation is estimated as 45 minutes.
1. the following table represents the u.s. sources of electrical
suppose it is known that the time spent by customers in a fast-food restaurant is a normally distributed variable with
Define mixed method research and describe its strengths. Provide an example of when it is appropriate to apply mixed method research in the human services field. Summarize how scientifically sound research supports the function of a human services..
Estimate a test statistic for null hypothesis H0: μ = 30 against two-sided alternative hypothesis H1 : μ ≠ 30, and by plotting this on its reference distribution.
city records indicate that the average age of the houses on the west side of town is 43 years with standard deviation
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