Statistics

Use Garbage.xls file which consists of data from 60 fictional homes on Concordia St.  It includes variables regarding the household size, the pounds of each type of garbage disposed in a week, the total weight of their garbage each week, and whether or not the household recycles.

• ASSIGNED PROBLEM 1:  First compute the mean total weight and standard deviation of the garbage disposed each week by the sample; use the Descriptive_Statistics.xls file if needed.  Then compute the 95% confidence interval of the mean total garbage disposed of in a week on Concordia St.  Describe your findings.
• ASSIGNED PROBLEM 2:  First compute the proportion of homes in the sample that recycle.  Then compute the 95% confidence interval of the proportion of homes on Concordia St. that recycle.    Describe your findings.
• ASSIGNED PROBLEM 3:  You wish to learn the average number of pounds of garbage disposed of in a week by the people on Concordia St. within 2 pounds.  Using the standard deviation from problem 1as an estimate, how large of a sample should you get? 
• ASSIGNED PROBLEM 4:  You wish to learn the proportion of homes on Concordia St. that recycle within 10% and with 99% confidence.  How large of a sample should you get?