For the number of hours of TV watching, the 2008 GSS reported a mean of 2.98 for the 1324 white subjects, with a standard deviation of 2.66. The mean was 4.38 for the 188 black subjects, with a standard deviation of 3.58. Analyze these data, preparing a short report in which you mention the methods used and the assumptions on which they are based, and summarize and interpret your findings.
Answer to relevant QuestionsUsing data from the National Survey of Families and Households, a study (from S. South and G. Spitze, American Sociological Review, vol. 59, 1994, pp. 327–347) reported the descriptive statistics in the following table for ...Using the sample size formula n = [p̂ (1 - p̂)z2]/m2 for a proportion, explain the effect on n of (a) Increasing the confidence level and (b) Decreasing the margin of error. When the population distribution is normal, the population mean equals the population median. How good is the sample median as a point estimate of this common value? For a random sample, the estimated standard error of the ...A recent survey of 1000 American women between the ages of 45 and 64 asked them what medical condition they most feared. Of those sampled, 61% said breast cancer, 8% said heart disease, and the rest picked other conditions. ...Exercise 8.6 reported heights (in mm) of 55.5, 60.3, 60.6, 62.1, 65.5, and 69.2 for six seedlings fourteen days after germination. a. Using software or a calculator, verify that the 95% confidence interval for the population ...
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