The volatility of Home Depot share prices is 30% and that of General Motors shares is 15%. When I hold both stocks in my portfolio and the stocks returns have a correlation of 1, the overall volatility of returns of the portfolio is ________
A) more than 15%
B) less than 30%
C) unchanged at 30%
D) equal to 15%
Answer: C
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The United States' Property-Liability insurance industry wrote how many billion worth of premiums in 2008?
A) 25.4 B) 97.4 C) 317 D) 439.8
In estimating the accuracy of data mining (or other) classification models, the true positive rate is
A) the ratio of correctly classified positives divided by the total positive count. B) the ratio of correctly classified negatives divided by the total negative count. C) the ratio of correctly classified positives divided by the sum of correctly classified positives and incorrectly classified positives. D) the ratio of correctly classified positives divided by the sum of correctly classified positives and incorrectly classified negatives.