Question: In Exercises 24,26, and 28, we've tested a hypothesis about whether the use of statistics in NEJM medical articles has changed over time. The table

In Exercises 24,26, and 28, we've tested a hypothesis about whether the use of statistics in NEJM medical articles has changed over time. The table shows the test's residuals.

a) Show how the residual for the 1989/No cell was calculated.
b) What can you conclude from the patterns in the standardized residuals?

1978-79 1989 2004-05 No Stats 3.39 1.68 -2.48 Stats 1.64 0.81 1.20

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