I need some help answering these questions:

1). Explain when and why a histogramis appropriate for describing the data.

2). Explain when and why a Bar Graph is appropriate for describing the data.

3). What particular elements of the graph do you want the reader to notice when viewing a histogram?

4). What is the overall impression that you expect the reader to have from looking at the graph?

5). What particular elements of the graph do you want the reader to notice when viewing a Bar Graph?

6). What is the overall impression that you expect the reader to have from looking at the Bar Graph?

Solution:

1) Histogram is used to observe (or view) variation in frequency of occurrence of data in it’s different intervals.

e.g., in a group of 1000 people, observing number of people having different heights, with minimum 5′ and maximum 7′, and interval of 2″. So intervals will be 5′-5’2″, 5’2″-5’4″, 5’4″-5’6″, …, 6’8″-6’10”, 6’10”-7’0″, and on Y axis each interval column will have height equivalent to number of people with the heights in that interval.

2) When a number of objects of same type with different numerical values to be compared, bar chart is utilized. …

This solution briefly looks at the differences between bar graph and histograms.