chapter 2

Question 1

what is the first step in constructing a graph of statistical data?

Answer 1

sort data in ascending order

Question 2

when are ogives most useful to decision-makers?

Answer 2

when decision-makers want to see cumulative growth

Question 3

what is the key advantage of stem-and-leaf plots over histograms?

Answer 3

Stem-and-leaf plots delineate every single x value in the data set so the spread of data is readily seen, whereas a histogram shows only classes of data and not the exact values of data within each class.

Question 4

what is the key difference between histograms and bar charts?

Answer 4

Histograms plot quantitative continuous data, whereas bar charts plot qualitative data.