Dot plots are normally used for discrete data. For data sets containing more than 20 data points, dot plots are often inconvenient and other representations are preferred.
First, we should notice the minimum and maximum values of the data set. It can be seen that they are 8 and 12, respetively. We can draw a horizontal number line for the dot plot from 7 to 13.
Next, we can mark a dot for each data point one by one until all points are marked.
From the dot plot, we can see that several packs had 10 banana-flavored candies and none had 11.
From the histogram, it can be seen that 65 apples weigh between 100 and 109 grams. In a histogram all intervals must have the same size.
If each interval in the histogram has approximately the same frequency it is said to be uniform.
When a histogram has a peak which is not in the middle, the histogram is skewed.
From the frequency table, the histogram can be constructed by drawing a bar over each interval a height corresponding to the frequency.