Researchers are comparing customers' shopping experience in Target, Market Basket, and Trader Joe's. Customers are given $50 and randomly assigned to shop at one of the stores. After that, each customer rates his/her satisfaction level with the store on a 1-7 scale (higher numbers mean more satisfied). Researchers found that the mean satisfaction level was 4.8, 5.7, and 6.5, for Target, Market Basket, and Trader Joe's respectively. They conducted ANOVA and found that the calculate F is bigger than the critical F. What do you know based on this information? a. There were statistically significant differences in satisfaction between Target and Trader Joe's. b. Customers were statistically significantly more satisfied with Trader Joe's. c. There were statistically significant differences in customers' satisfaction with the three stores. d. The satisfaction with Target was significantly lower than that with the other two stores