Subjects were classified according to which of three groups they were assigned. Group A received lots of praise. Group B received moderate praise. Group C received no praise for correct answers to math problems. Following the manipulation, all subjects completed a posttest measure of mathematical ability. Higher scores indicate greater mathematical ability.

Does praise influence performance?

$\begin{array}{|ccc|}\hline \text{Group A}& \text{Group B}& \text{Group C}\\ 7& 4& 3\\ 6& 6& 2\\ 5& 4& 1\\ 8& 7& 3\\ 3& 5& 4\\ 7& 7& 1\\ \hline\end{array}$

Identify the IV and the scale of measurement;

Identify the DV and the scale of measurement and for the IV – identify the number of levels;

Identify null and alternative hypotheses, are they directional or non-directional?

Assume that the distributions of the populations are approximately normal.

Does praise influence performance?

Identify the IV and the scale of measurement;

Identify the DV and the scale of measurement and for the IV – identify the number of levels;

Identify null and alternative hypotheses, are they directional or non-directional?

Assume that the distributions of the populations are approximately normal.