Exam 2: Frequency Distributions and Graphs

If the limits for a class were 20-38, the boundaries would be 19.5-38.5.

A recent statistics exam yielded the following 25 scores. Construct a grouped frequency distribution with the class limits shown below. 61 90 79 57 63 55 83 70 62 95 90 83 41 72 85 76 82 75 94 57 72 72 46 81 93

Thirty students recorded the colors of their eyes, choosing from the colors brown, blue, green, hazel, and black. This data can be appropriately summarized in a(n)______________ .

Construct a frequency polygon from the following frequency distribution.

Using the ogive shown below, what is the cumulative frequency of data values less than or equal to 16 ?

What is the midpoint of the class 6-10 ?

The frequency polygon and the histogram are two different ways to represent the same data set.

Find the class with the greatest number of data values.

In an ungrouped frequency distribution of the average age of high school graduates, what would be the boundaries for the class of graduates who were reported to be 18 years old?

A histogram is a graph that represents the cumulative frequencies for the classes in a frequency distribution.

When making Pareto charts, data should be arranged ________________________ according to frequency.

A stem and leaf plot has the advantage over a grouped frequency distribution of retaining the actual data while still showing them in graphical form.

A recent statistics exam yielded the following 10 scores. Construct a frequency polygon distribution using the class limits shown below. 80, 99, 77, 67, 93, 70, 76, 86, 79, 71

Karen is constructing a pie graph to represent the number of hours her classmates do homework each day. She found that 8 of 24 classmates did homework for three hours each day. In her pie graph, this would represent how many degrees?

Graphs that show distributions using proportions instead of raw data as frequencies are called

Construct a pie graph using the following data from a local bakery.

What is the lower class limit of the class 13-17?

The frequency polygon is a graph that displays the data by using lines that connect points plotted for the frequencies at the midpoints of the classes.

The lower class limit represents the smallest data value that can be included in the class.

A weatherman records the amount of rain that fell in Portland, Oregon each day for a year. What type of graph should he use to show how rainfall changes during the year ?