They tried to learn a list of 10 words f lashed rapidly on a screen before them. Here are the scores made by the students on a retention test taken after three learning trials. Table A ln a frequency polygon, frequencies are represented by points connected by lines. Draw a histogram for the frequencies in the experiment. If we drew a line down the middle of a skewed distribution, the two halves would not be mirror images of each other as they would be in a symmetrical distribution.
Skewed distributions are negatively or positively skewed.
The distribution above is negatively skewed since the tail of the distribution, where there are few scores. The right side of the distribution has the greatest number of scores or frequencies. If the tail of the distribution was on the right side, then we would have a positively skewed distribution. In flat-rectangular distributions, the scores are evenly distributed along the score scale. In the J-curve, the most scores have small values.