Compare the panel (a), (b), (c) and (d). Suppose these figures were made by four

Question

Compare the panel (a), (b), (c) and (d). Suppose these figures were made by four independent groups. They all measured the same X and Y using the same apparatus. If the slope of the best fit line shown in these figures are (a) +0.00011 (b)-0.00015 (c)-0.000004 and (d)+0.00000019 you would conclude (c 1, X and Y have a linear relationship, consistently shown in all the four cases O2.X and Y are likely dependent of each and are correlated. 03.X and Y are likely independent of each other and are not correlated. 04. X and Y have a linear relationship, but could have either positive or negative slope.

Explanation / Answer

If you view each of these graphs independently, within the limits of error shown in each of these plots, the variable Y appears to be linear with respect to X. Hoever, the slopes obtained by different observers are diffrent,depending on some other unknown factors of the experiment.

Hence answer is (4)

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