=+296–299) reported on an investigation in which lead hip internal peak rotational velocity (x) and trailing hip peak external rotational velocity (y)

were determined for a sample of 15 golfers. Data provided by the article’s authors was used to calculate the following summary quantities:

^(xi 2 x)

2 5 64,732.83,

^(yi 2 y)

2 5 130,566.96,

^(xi 2 x)(yi 2 y) 5 44,185.87