Db forum #8
1. How are confidence intervals useful in statistical analysis?
2. Explain the tradeoff between confidence and precision.
3. Complete problem 14 from Chapter 8.
*Respondents to the GSS (N=1,166) worked a mean of 40.27 hours per week (s=15.54). Construct a 99% confidence interval around this sample value, and interpret the interval inn words.
4. Would you calculate problem 14 differently if the sample size were 75? Why and how? How do you expect the results would differ from those obtained with the larger sample size?
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