A company that develops an automated customer service model is interested in knowing whether two versions, Version A and Version B, will get different ratings from customers. Participants in a focus group are taken through samples from both versions, then take a survey to rate each version. A summary of the data obtained from the study is given below. Assume ratings from the different surveys generally have the same standard deviation.

Version A Version B Mean 33.133 28.67 Observations 15 15 Pearson Correlation -0.325 Hypothesized Mean Difference 0.00 df 14 t Stat -1.426 P(T