The type of statistical graph that retains information about the number of samples is;
Option A; Stemplot
To answer this, we need to know about the statistical graphs in the options given.
- Option A; Stemplot; A stemplot is a bit like histogram with the main difference being that it shows more more information than the histogram and in addition it displays the data sets. It is made up of stems and leaves where the largest values are plotted under stem while the lowest values are under leaf. Thus, it means one can see all the scores from the sample.
- Option B; Relative bar graph; In this bar graph, the values on the y-axis are usually in percentages while the x-axis shows the data being studied . This one doesn't retain information about the number of samples.
- Option C; Pie Chart is a circular graph where each arc slice denotes the proportion of the data in the sample. Thus, it doesn't retain the information on the number of samples.
- Option D; Relative frequency Polygon; It's used to show frequency between each interval from the sample and as such doesn't retain info about the number of samples.
In conclusion the only correct option is Option A.
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