Refer to the Naval Oceanography Portal data on number of minutes of daylight per day in Sharon,
Question:
a. Determine the number of days in 2009 that need to be sampled in order to estimate the desired mean to within 45 minutes of its true value with 95% confidence.
b. Based on your answer, part a, develop a sampling plan that will likely result in a random sample that is representative of the population.
c. Go to the Web site, aa.usno.navy.mil/USNO/astronomical-applications/data-services, and collect the data for Sharon, PA in year 2009 using your sampling plan.
d. Use the data, part c, to construct a 95% confidence interval for the desired mean. Does your interval have the desired width?
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