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A sociologist wants to determine if the life expectancy of people in Africa is less than the life expectancy of people in Asia.
The data obtained is shown in the table below.
Africa:Sample mean 55.3,Population standard deviation 8.1, sample size 53
Asia: Sample mean 65.3, Population standard deviation 9.3, sample size 42
Calculate the critical value. Use a=0.05
a) 2.33
b) 2.58
c) 1.96
d) 1.65
Does this mean immigrants tend to earn more than other people? Or does it mean immigrants improve a state's economy? If not, what could explain the correlation?
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A survey of the number of calls received by a sample of Southern Phone Company subscribers last week revealed the following information.
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Using a significance level of .01 to test this hypothesis, what is your decision rule?
It has been claimed that women live longer than men; however, men tend to be older than their wives. Ages of sixteen husbands and wives from England were obtained. These data should be analyzed with a
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In a survey of the 3000 boy scouts in the National Capital Area Council (NCAC), it is found that they have a mean weight of 135 lbs with a standard deviation of 15 lbs. How many of the boy scouts have weights between 120 lbs and 150 lbs.?
About 40% of the general population donate time and energy to community projects. Suppose 15 people have been randomly selected from a community and each asked whether he or she donates time and energy to community projects.
The following table gives the number of U.S. families, in thousands, with pet dogs, pet cats, and pet birds, by size of family.
Describe the correct statistical procedures for analysis for how has quality of care changed in hospitals that are part of a pay for performance (P4P) program?
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