Identify whether each of the following is a matched pair or a two-sample t-test. Justify your decision. a. A company introduces an exercise break for its workers to improve job satisfaction. They plan to conduct a survey of 100 employees before and after they implement the exercise program. They will measure job satisfaction by turning the responses into a satisfaction index which will be a value from 0 to 40, where 40 is the highest job satisfaction score and 0 being poor job satisfaction score. b. A researcher wanted to see if there is a different in resting pulse rate for men and women. He collects a random sample of 30 men and a second random sample of 30 women and records their resting heart rate.

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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.