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1. Testing the effect of a diet and exercise regimen on subjects' cholesterol levels, a sports medicine clinic enlists 40 volunteers whose cholesterol levels are mea- sured before and after the 1-month program. The before and after data are listed in data file XR14058. Using the sign test and the 0.025 level of significance, examine the effectiveness of the diet and exercise program. Identify and interpret the p-value for the test.
2. According to R.L. Polk & Company, the median age of automobiles and trucks on the road in the United States is about 9 years. The ages for a random sample of vehicles in the executive parking lot of a metal fabrication company are listed in file XR14059. Using the sign test and the 0.05 level of significance, examine whether the median age for cars driven to work by the com- pany's executives might be less than the median reported by R.L. Polk. Identify and interpret the p-value for the test.
Source: theautochannel.com, July 31, 2009.
It is believed that population standard deviation is 15 days. If test is conducted using a 0.05 level of significance, what conclusion must be reached?
Determine her completion time so that only 10% of the students doing the test will take longer than her? For a set of 5 randomly selected tests (each with 10 questions), what is the probability that her mean completion time will be 14 minutes or mo..
after a pretty successful life financially you decide to give away your fortune to your five children. your fortune
Howell and Newcombe examined 6 month old infants who were low birth weight babies when they were born. Each child was rated on the Bayley Psychomotor Development Index.
Measuring and controlling project deliverables is essential to validating work performed within a project. Evaluate how project status reports are useful for measuring and controlling resource efforts, project schedules, project costs, and project fe..
statistics released by the national highway safety administration show that on an average weekend night in urban areas
At the 5% level do the data provide sufficient evidence to conclude that the mean time served for fraud is less than that for firearms offenses? Identify the appropriate test and test the claim using the traditional method at the 0.05 level of sig..
the data show systolic and distolic blood presure of certain people. find the regression equation letting the first
describe data and objectives - starting with descriptive statistics reader has no idea what this is all about histogram
A sample size n=100 is taken from a population that has a proportion p= 1/5. If, in the sample, ^p=0.25, will the 95% confidence interval for p contain the true value of p^is at top p at bottom ^p
two pain relief drugs are being considered. a random sample of 8 doses of the first drug showed that the average amount
A manufacturer of flashlight batteries took a sample of 13 batteries from a day's production and used them continuously until they failed to work.
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