Stock prices: The Standard and Poor's (S&P) 500 is a group of 500 large companies traded on the New.r York Stock Exchange. Following are prices, in dollars, for one day for a random sample of seven stocks. 74.23 35.25 13.19 53.55 34.25 201.94 24.68 SaddatatoEmel Assume the population standard deviation is o = 47. Explain why it is necessary to check whether the population is approximately normal before constructing a condence interval. It is necessary to check whether the population is approximately nonnal because (Choose one) 1