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​Scientists wish to determine if there is a positive linear relationship between height and arm span.

Which of the following would give us evidence of a positive relationship between these variables in a sample of $40$ random subjects?


The correlation coefficient being close to $-1$.


The p-value in a linear regression $T$-test being close to $0$ when testing

$H_0 : B = 0$
$H_a: B > 0$


A residual plot that shows the data points haphazardly scattered.


A slope in the LSRL close to $1$.


A scatterplot without any influential points or outliers.

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