Assume that the average expected return for the S&P 500 from 2015 to 2020 was 7.8%. In addition, the standard deviation of returns was 12%. Based on this information, answer the following questions Based on these numbers, we can be 95% confident that in 2021 the lowest return we could anticipate to earn from an S&P 500 stock portoflio would be -16.2% O True False On the other hand, with 95% confidence, the highest return we could expect to earn from an S&P 500 stock portfolio would be 31.8% True False