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.

n

=

Point estimate for Version A: x

1

=

Degrees of freedom: df

=

p

=

t

=

t

=

Point estimate for Version B: x

2

=