Question: Implement the test in Problem 10.149, and provide a p-value (two-tailed)? A more efficient method of analysis would leave the change in retinopathy level in

Implement the test in Problem 10.149, and provide a p-value (two-tailed)?

A more efficient method of analysis would leave the change in retinopathy level in its raw form without grouping the data but would take into account the ordinal nature of the change scores.

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