Does your doctor know (part 4) In Exercises 24, 26, and 28, weve tested a hypothesis about whether the use of statistics in NEJM medical articles has changed over time The table shows the tests 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 Stats 3 39 1 68 2 48 1 64 0 81 1 20

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Question: Does your doctor know? (part 4) In Exercises 24, 26, and 28, weve tested a hypothesis about whether the use of statistics in NEJM medical

Does your doctor know? (part 4) 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.

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

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 Stats 3.39 -1.68 -2.48 -1.64 0.81 1.20

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