Q:

MATH 25 POINTS!! DUE TODAY! PLEASE HELP!! ASAP!!

Accepted Solution

A:
1. There is a correlation between scores of an assessment and prep hoursI'm assuming there's no other figure or anything; that this is the entire problem.I'll further assume by correlation they mean positive correlation - more  hours studying means a better score.Slope of 2.35 is reasonable.  CHECKCorrelation doesn't tell us what the slope is; any positive slope is reasonable.  It will depend on the scoring levels of the test.Correlation should be fairly strong to strongIf all we know is correlation we don't know if it's strong.  No check.Based on the study, ... sleep ...We don't know anything about sleep; no checkCausation ...It's an old saw: Correlation does not imply causation.  No checkA value of r = -.88 is reasonableHere when we say there's a correlation we seem to mean a positive correlation, so I'm going with not reasonable, no check.2. Correlation between # training days and amount of rainfall.   Increasing rainfall during spring training, less after.Here we have what's likely a negative correlation -- more rain means less training.r = 0.79 is possibleI'll go with no check here because we expected a negative correlation.... causation ....No check.high amount of rainfallCorrelations tells us how the variations from average of two things line up. The value of the average itself doesn't matter.  No checkStrength of correlation is hard to determine with information givenThat's a CHECK.  We have no information on the strength.Slope = -9.84 is reasonableCHECKIt's negative; the exact value will depend on units of things.