2. Store Item profit time-series data Quarter Profit Mar 01 10272 Jun 01 7392 Sep 01 7776 Dec 01 10080 Mar 02 10848 Jun 02 8352 Sep 02 8352 Dec 02 10848 Mar 03 11616 Jun 03 8832 Sep 03 9216 Dec 03 11040 Mar 04 12672 Jun 04 10176 Sep 04 10272 Dec 04 12480 Population Standard Deviation = 1486 Ho: p = $ 10820 Profit threshold ($) 8838.5 Confidence level (%) 89.9 As stated above, your dataset is a sample of sixteen quarters of profit data. However, you are required to calculate a confidence interval for the proportion of all quarters that show a profit above the threshold given to you in your data (i.e. the population proportion). 1. Calculate the proportion (p) of your sample of quarters that shows a profit above the given threshold.