FORESTRY
AGRICULTURAL STATISTICS AND ECONOMICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the entrance exam is a good predictor of success.
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the exam is a poor predictor of success.
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students who do best on this exam will be poor students.
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students at this school are underachieving.
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the college should hire a new statistician.
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Detailed explanation-1: -The entrance. A correlation coefficient between “college entrance e x a m” grades and scholastic achievement was found to be-1.08. On the basis of this, you would tell the university that: The e x a m is a poor predictor of success.
Detailed explanation-2: -Based on data taken from airline fares and distances flown, it is determined that the equation of the least-squares regression line is ŷ = 102.50 + 0.65x, where ŷ is the predicted fare and x is the distance, in miles.
Detailed explanation-3: -The correlation between the distance travelled by a hiker and the time spent hiking is r = 0.9 meters per second. We found a high correlation between the height and age of children: r = 1.12. The correlation between mid-August soil moisture and the per-acre yield of tomatoes is r = 0.53.