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Selected Answer: False Correct Answer: False Question 4 10 out of 10 points To do linear regression, there must be paired scores on two variables.Selected Answer: True Correct Answer: True Question 5 10 out of 10 points If sX= sYthen r= bY.Selected Answer: True Correct Answer: True Question 6 10 out of 10 points Generally, one can use the same regression equation for predicting Ygiven Xas for Xgiven Y.Selected Answer: False Correct Answer: False Question 7 10 out of 10 points
If sY= sX, then r= bY.Selected Answer: True Correct Answer: True Question 8 0 out of 10 points If the standard error of estimate for relationship 1 equals 5.26 and for relationship 2 it equals 8.01 then we can reasonably infer that relationship 2 is less perfect than relationship 1.Selected Answer: False Correct Answer: True Question 9 10 out of 10 points The least squares regression line insures the maximum number of direct hits.Selected Answer: False Correct Answer: False Question 10 10 out of 10 points The regression line will always go through the point .Selected Answer: True Correct Answer: True Thursday, April 30, 2015 6:46:23 PM CDT OK
Question 1 0 out of 10 points The value aYis the Xaxis intercept for minimizing errors in Y. Selected Answer: True Correct Answer: False Question 1 4 out of 4 points If events A and B are independent, then p(A and B) = _________. Selected Answer: c. p(A)p(B) Correct Answer: c. p(A)p(B) Question 2 0 out of 4 points If you have 15 red socks (individual, not pairs), 24 green socks, 17 blue socks, and 100 black socks, what is the probability you will reach in the drawer and randomly select a pair of green socks? (Assume sampling without replacement.) Selected Answer: b. 0.3077 Correct Answer: c. 0.0228 Question 3 0 out of 4 points
If p(A and B) = 0, then A and B must be _________. Selected Answer: c. exhaustive Correct Answer: a. mutually exclusive Question 4 4 out of 4 points If the probability of drawing a member of a population is not equal for all members, then the sample is said to be _________. Selected Answer: c. biased Correct Answer: c. biased Question 5 0 out of 4 points A "hungry" undergraduate student was looking for a way of making some extra money. The student turned to a life of vice - gambling. To be a good gambler, he needed to know the probability of certain events. Help him out by answering the following question. The probability of drawing a face card (king, queen or jack) of any suit from a deck of 52 ordinary playing cards in one draw is _________. Selected Answer: d. 0.020
Correct Answer: c. 0.231 Question 6 4 out of 4 points If p(A)p(B|A) = p(A)p(B), then A and B must be _________. Selected Answer: d. independent Correct Answer: d. independent Question 7 0 out of 4 points Two events are mutually exclusive if _________. Selected Answer: b. they are independent Correct Answer: a. they both cannot occur together Question 8 4 out of 4 points If p(A) = 0.6 and p(B) = 0.5, then p(B|A) equals _________.
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