Scatter diagram with two regression lines
If there is a scatter diagram with two regression lines (y from x and x from y) and they both have the same average and the same SD what should the two lines look like when plotted?
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A sample of 12 radon detectors of a certain kind was selected, and each was exposed to 100 pCi/L of radon. The resulting readings were as follows:
A polygraph machine detects lies 65% of the time. But it incorrectly flags the true statement as a lie 15% of the time.
A sample of 12 random detectors of a certain type was selected, and each was exposed to 100 pCi/L of radon. The resulting readings were as follows:
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The average math SAT score is 523 with standard deviation of 118. A specific high school claims that its students have unusually high math SAT scores. A random sample of 45 students from this school was selected, and the mean math SAT score was 56
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