=+were determined for a sample of 15 female collegiate golfers during their swings. The following data was supplied by the article’s authors:

Golfer ER IR diff z quan 1 2130.6 298.9 231.7 21.28 2 2125.1 2115.9 29.2 20.97 3 251.7 2161.6 109.9 0.34 4 2179.7 2196.9 17.2 20.73 5 2130.5 2170.7 40.2 20.34 6 2101.0 2274.9 173.9 0.97 7 224.4 2275.0 250.6 1.83 8 2231.1 2275.7 44.6 20.17 9 2186.8 2214.6 27.8 20.52 10 258.5 2117.8 59.3 0.00 11 2219.3 2326.7 107.4 0.17 12 2113.1 2272.9 159.8 0.73 13 2244.3 2429.1 184.8 1.28 14 2184.4 2140.6 243.8 21.83 15 2199.2 2345.6 146.4 0.52