(c) The NGO wanted to see how better eyesight for people using its contact lenses was valued in the labour market. They surveyed wages of people waiting to receive their contact lenses and of people who had received new lenses within the past year. The following table shows the Excel printout for the t-test for testing if there was a difference in weekly wages between the two groups: t-Test: Two-Sample Assuming Unequal Variances Waiting Got lenses Mean 12.221 15.486 Variance 23.720 56.774 Observations 14 70 Hypothesized Mean Difference 0 df 27 t Stat -2.062 P(T