Part A You are an investment analyst for Goldman & Sachs. Your supervi- for provides you with a dataset containing 200 stock values. These are the end-of-the-day values from the S-and-P index for the 20"h of No- vember 2021 (Sheet called led "Part A" in the excel file "Practical Test - Data Seth 1. What is the mean and standard deviation of the stocks (Consider the dataset to be the population)? SwollA amiT up to andmull Infor a judmul lafoT 2. You realise that it is not such a good idea to consider the dataset to be the popu- lation of stocks. Rather you assume that it is a sample. Calculate the mean and the standard deviation of the same data set, now considering it as a sample