Macmillan Learning Which statement is correct? Correlation...

Macmillan Learning Which statement is correct? Correlation and causation are synonyms. Shortly after a new president takes office, the unemployment rate goes down. One must conclude that the new president's economic policies are responsible for the economic upturn. The fact that two variables are correlated with each other does not mean that one causes the other. If two variables move together, then they are causally related.

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Transcript

00:01 Hi, i'm david and i'm here to have you answer your question.

00:03 Now let me pick up your question here.

00:06 In the question here we are going to discuss about the correction coefficient.

00:10 Let me remind you that when we have the graph on the linear recursion, we will have the case where we have the plot on the point here and we have the past slide will be this one.

00:23 And this one will be have the point to slope.

00:27 And the point to the slot it will correspond to the coefficient or.

00:31 It will be quoted than the 0.

00:33 The second case is when we have the pawn of the, it will be something like this, and then we have the best line here.

00:44 And in this case here, the slop, it will be negative, and when the lumps negative, we have the r must be smaller than the 0.

00:53 Now we have done the question coefficient r.

00:56 It must be between the minus 1 and the 1.

01:01 And now here we have several statements and we need to choose the correct statement here.

01:09 So the first one says that a correction under 1 indicate that there is a little or no linear relationship.

01:15 That could be wrong because 1 and minus 1 will be the stronger one.

01:19 So therefore the first one will be wrong.

01:22 Sorry, the first one will be here.

01:24 That could be wrong...

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