FORESTRY
AGRICULTURAL STATISTICS AND ECONOMICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The point estimate for the difference of two proportions is:
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z*
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xbar1-xbar2
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sqrt(p*(1-p)/n)
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p-hat1 minus p-hat 2
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Explanation:
Detailed explanation-1: -The point estimate for the difference between the two population proportions, p 1 − p 2, is the difference between the two sample proportions written as p ^ 1 − p ^ 2 .
Detailed explanation-2: -To do it, you need two numbers. One is the sample size (n) and the other is the number of occurrences of the event or parameter in question (X). The equation for p-hat is p-hat = X/n. In words: You find p-hat by dividing the number of occurrences of the desired event by the sample size.
Detailed explanation-3: -We define p = x/n, the proportion of successes in the sample, to be the point estimate of p. For example, if I observe n = 20 BT and count x = 13 successes, then my point estimate of p is p = 13/20 = 0.65.
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