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CHALLENGE ACTIVITY 8.1.4: Hypothesis testing for two population means (two-tailed t-test). 270604 1953466.qx3zqy7 Jump to level 1 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 39.333 34.4 Observations 15 15 Pearson Correlation -0.011 Hypothesized Mean Difference 0 df 14 t Stat -2.086 P(T