The article "A Method for the Estimation of Alcohol in Fortified Wines Using Hydrometer Baumé and Refractometer Brix" (Amer. J. of Enol. and Vitic., 2006: 486-490) gave duplicate measurements on distilled alcohol content (%) for a sample of 35 port wines. Here are averages of those duplicate measurements:

Use the Ryan-Joiner test to decide at significance level .05 whether a normal distribution provides a plausible model for alcohol content.

Transcribed Image Text:

15.30 16.20 16.35 17.15 17.48 17.73 17.75 17.85 18.00 18.68 18.82 18.85 19.03 19.07 9.08 19.17 19.20 19.20 19.33 19.37 19.45 9.48 19.50 19.58 19.60 19.62 19.90 19.97 20.00 20.05 21.22 22.25 22.75 23.25 23.78