In a Study of Copper Deficiency in Cattle, the Copper $s _ { 1 } = 21.5$

Essay

In a study of copper deficiency in cattle, the copper values (ug Cu/100mL 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 $s _ { 1 } = 21.5$ (m = 48) for the anomalous condition and $s 2 = 19.45$ (n = 45) for the nonanomalous condition. Test for the equality versus inequality of population variances at significance level .10 by using the P-value approach.