In a study of copper deficiency in cattle [An Investigation into Copper Deficien
ID: 2954672 • Letter: I
Question
In a study of copper deficiency in cattle [An Investigation into Copper Deficiency in Cattle in the Southern Pennines, Journal of the Agricultural Society of Cambridge, 1972: 157-163], the copper values (g Cu/100 mL blood) were determined both for cattle grazing in an area known to have well-defined molybdenum anomalies (metal values in excess of the normal range of regional variation) and for cattle grazing in a nonanomalous area, resulting in s1 = 21.5 (n1 = 48) for the anomalous condition and s2 = 19.45 (n2 = 45) for the nonanomalous condition. Test for the equality versus inequality of population variances at significance level 0.10 by using the p-value approach. (from [Devore 2009])Explanation / Answer
It's a two-tailed test, so use a critical value of .10/2 or .05. This will give a P-value of .5046