The data in the accompanying table of 36 diamonds includes the price (in dollars), the weight (in carats), and the clarity grade of the diamonds. The diamonds have clarity grade either VS1 or VVS1. VVS1 diamonds are nearly flawless; VS1 have more visible (but still small) flaws. Complete parts a through e.
(a) Would it be appropriate to use a two-sample t-test to compare the average prices of VS1 and WS1 diamonds, or is this relationship confounded by the weights of the diamonds? O
A. two-sample comparison of weight by clarity shows that the average weight is almost the same in the two groups. Weight is likely to be a confounding effect in this analysis. B. A two-sample comparison of weight by clarity shows that the average weight is different in the two groups. Weight is likely to be a confounding effect in this analysis. C. A two-sample comparison of weight by clarity shows that the average weight is almost the same in the two groups. Weight is unlikely to be a confounding effect in this analysis. D. A two-sample comparison of weight by clarity shows that the average weight is different in the two groups. Weight is unlikely to be a confounding effect in this analysis