In Exercise 46, we saw in the Swim the Lake 2016 data that Vicki Keith’s round-trip swim of Lake Ontario was an obvious outlier among the other one-way times.

Here is the new regression after this unusual point is removed:

a) In this new model, the value of se is smaller.
b) Are you more convinced (compared to the previous regression) that Ontario swimmers are getting faster (or slower)?

Transcribed Image Text:

Dependent variable is Time R-Squared = 2.8% s = 302.1 Variable Intercept Year since 1954 Coefficient 1135.99 3.024