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Verify that for the following pairs of points, the least squares regression line has a slope of zero. Plot the points and comment on the assumption that the regression line is straight.
X: 1 2 3 4 5 6
Y : 1 4 7 7 4 1
Statistics and Probability, Statistics
The sample distribution on individual IQ scores (raw scores) has a sample mean of 100 and a standard deviation of 16. What proportion of the sample mean will fall at or above a mean of 102.56? Round the answers to no mor ...
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An aerospace company has submitted bids on two separate federal government defense contracts, AandB . The company feels that it has a 60% chance of winning contract Aand a 30% chance of winning contractB . If it wins co ...
You want to try your hand at investing.You want to invest in WellsFargo because you think their hard times are behind next ten years at least. In fact, they have estimated that the increasing at a rate of 18% per year fo ...
Assume that the fisherman can use between 5 and 8 lines. With 5 lines, the probability of a catch on each line is 0.71. With 6 this probability is 0.63, with 7 it is 0.51, and with 8 the probability is 0.43. 1) How many ...
Suppose a researcher is interested in the number of good versus bad dreams that students have during final exam week. The researcher states that p = 0.52 that a student will have a bad dream during final exam week. (a) ...
A survey asks 20002000 ?workers, "Has the economy forced you to reduce the amount of vacation you plan to take this? year?" FiftyFifty?-fourfour percent of those surveyed say they are reducing the amount of vacation. Twe ...
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