In January 2019, a small company headquartered in Baltimore needed to track its cost per employee in 2018 for tax purposes. The company had 98 employees at the time. The CFO prepares a chart listing the name of each employee along with his or her salary, total amount of any bonuses received, health insurance cost, whether the employee is participating in Car efirst or Kaiser, the company’s 401K contribution and whether the employee took any college courses in 2018 (1 for yes, 0 for no.) (a) How many cases are there? (b) How many variables are there? (c) Give the W’s. (d) Tell whether each variable is categorical or quantitative. (e) For quantitative variables, give the units.

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Bar Graphs

A bar graph is a chart or graphical representation of data. A bar chart, also known as a bar graph, is a graph or chart that displays categorical data using rectangular bars with heights or lengths equal to the values they represent. Typically, bar graphs show categorical and numerical variables grouped in class intervals. A bar graph is useful for comparing and analyzing a set of data.