Examine Figure 8-8, “Fall Back.”
(a) Of the 1024 adults surveyed, 66% were reported to favor daylight saving time. How many people in the sample preferred daylight saving time? Using the statistic p̂ = 0.66 and sample size n = 1024, find a 95% confidence interval for the proportion of people p who favor daylight saving time. How could you report this information in terms of a margin of error?
(b) Look at Figure 8-8 to find the sample statistic p̂ for the proportion of people preferring standard time. Find a 95% confidence interval for the population proportion p of people who favor standard time. Report the same information in terms of a margin of error.

Transcribed Image Text:

Fall Back Each fall, we roll the clocks back to standard time. However, not everyone likes going back to standard time. Percentage of adults who prefer Standard time 28% No preference 6% FFED 66% Daylight saving time 69