Purchase Solution

Testing correlation for signficance.

Not what you're looking for?

In both cases, give a number of data points, n, and a correlation coefficient, r. Draw a number of data points, n, and a correlation coefficient, r. Tell whether the
correlation is significant at 0.05 or 0.01 level, explain.

n=50 points, r=0.35.

n=20 points, r=0.58.

Solution Summary

Interprets whether two correlation coefficients indicate significant correlations. The significant points of a function is determined.

Solution Preview

OK, now that you've chosen your sample sizes and r values, you should start with drawing them. For the first one, r=.35, let's start with imagining what the slope of this would look like. Remember that when r=0, your slope=0; that is, your line of best fit (the one that fits the data points) goes horizontally straight across. When r=1, your line goes on a perfect diagonal from the bottom left-hand corner of your graph to the top right-hand one. When r=.50, your line would fall half-way between the perfect diagonal we see with r=1, and the flat line we see with r=0. So now, imagine what r=.35 should look like - it should be on a slope just a little less steep than that for r=.50. Once you draw that, you should fill in 50 points that surround that line - half of them should be above it, and half below ...

Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.