(Solved): 2 Olympic National Park in Washington State had a survey conducted in 2012 to collect information o ...

2 Olympic National Park in Washington State had a survey conducted in 2012 to collect information on park usage. Park staff visited 30 wilderness trailheads in moderate- to high-use areas over a 60-day period and asked hikers to complete a questionnaire. Out of 2022 hikers asked, 1019 completed questionnaires. The survey found that 694 hikers were day users and 325 were overnight users. a. What were the target population and sampling units? What was the nonresponse rate of the survey? b. Why do you think the park staff only visited trailheads in moderate- to high-use areas to obtain the sample? c. Assuming that the 1019 respondents represent a random sample of users in the wilderness areas in Olympic National Park, give a \( 90 \% \) confidence interval for the proportion of day users. d. The response rate was \( 49 \% \) for day users and \( 52 \% \) for overnight users. Does this lessen any concerns you might have regarding the effect of nonresponse on the interval you obtained in part (c)? Explain briefly. e. Do you think it would be better to refer to the interval in part (c) as a confidence interval for the proportion of day users in the park, or the proportion of day users on the most popular trails in the park? Explain briefly and write a sentence to report your interval from part (c).