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Question 2 4 pts a : Sample variance -0.2 0.1 upa moan Figure 1: scatter plot of sample means and variances of 30 stock returns in bull and bear markets. The horizontal axis represents the sample mean and the vertical axis the sample variance. 30 stocks are randomly selected from the New York Stock Exchange (NYSE) and their monthly returns are recorded. Each of the stock's return data is then split into two sub-samples according to the aggregate market condition: bull and bear. Then, the sample mean and sample variance are calculated for each sub-sample and stock. For example, one stock returns (IBM for instance) are split into two sub-samples. Then four summary statistics are calculated. 1) sample mean in the bull market sub-sample; 2) sample variance in the bull market sub-sample; 3) sample mean in the bear markets sub-sample; and 4) sample variance in the bear markets sub-sample. Each red dot in Figure 1 shows the sample mean (x-axis) and sample variance (y-axis) of one stock's returns in the bull market sub-sample, and each blue dot shows the sample mean (x-axis) and sample variance (y-axis) of one stock's returns in the bear market sub-sample. Hence, there are totally 30 blue dots and 30 red dots. In no more than 200 words, describe Figure 1 and any inference that you draw from it