The Prescott National Bank has six tellers available to serve customers. The data in the following table provide the number of busy tellers observed during 25 spot checks.
a. Use single-value grouping to organize these data into frequency and relative-frequency distributions.
b. Draw a relative-frequency histogram for the data based on the grouping in part (a).
c. Identify the overall shape of the distribution of these numbers of busy tellers.
d. State whether the distribution is (roughly) symmetric, right skewed, or left skewed.
e. Construct a dotplot for the data on the number of busy tellers.
f. Compare the dotplot that you obtained in part (e) to the relative-frequency histogram that you drew in part (b).

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