1. [25 marks total] Part A: A student surveyed 45 companies to obtain details on their income (from sales) and whether they had invested in capital stock like plant and equipment in the last two years. Considerable research suggests that incomes of companies with capital investments exceed those companies who did not invest. The following table shows the Excel printout for the tI'est for testing if there was a difference in incomes (from sales) between the two groups: t-Test: Two-Sample Assuming U nequal Variances alpha = 0.05 No Capital investment invested in Capital Stock Mean 183,389.17 220,453.33 Variance 3,005,675,929.71 4,946,694,613.33 Observations 24 21 Hypothesized Mean Difference 0 df 38 t Stat -1.951 P(T