Exam 2: Frequency Distributions and Graphs

Which of the following is a Pareto chart?

Construct a pie graph using the following data from the local Cookie Types Number Sold Chocolate Chip 20 Peanut Butter 15 Oatmeal 30 Sugar 10 bakery.

Given the following two sets of data, draw a stem and leaf plot. 12,22,22,24,34,31,26,35,27,39,49,10 45,36,23,16,37,28,18,13,10,23,30,31

The __________ is obtained by first adding the lower and upper limits and then dividing by 2. ________________________________________

A __________ would most appropriately represent the yearly-number of students that were enrolled in Statistics over the past ten years. ________________________________________

Which of the following is a histogram?

Graphs give a visual representation that enables readers to analyze and interpret data more easily than they could simply by looking at numbers.

The rate of mortality of children is very high in the first weeks of life. It then decreases rapidly until 1 or 2 years of age and then increases slowly into the teen years. In this situation one should construct relative frequency distributions (per year of age) with narrow class widths during the first year of life so as to exhibit the quickly changing mortality rate.

The larger the sample size, the larger the relative frequencies.

A weatherman records the amount of rain that has fallen in Vancouver,B.C. during each day. What type of graph should he use?

The percentage of white, wheat, and rye bread sold at a supermarket each week is best shown using a __________ graph ________________________________________

An ogive graph is also called a cumulative frequency graph.

$\text { Construct a pie chart for the following distribution: }$ Major Percent of Students Business 159 Seience 45 Engineering 75 Social Sciences 50 Liberal Arts 60 Education 110

The three most commonly used graphs in research are the histogram, the __________, and the cumulative frequency graph (ogive). ________________________________________

The range 31.87-34.33 is not a good choice for class boundaries because

A stem and leaf plot is useful for keeping more precision than a grouped frequency distribution.

For the class 10-18, the upper class limit is

When the range is large and classes that are several units in width are needed, a __________ frequency distribution is used. ________________________________________

The __________ is the number of values in a specific class of a frequency distribution. ________________________________________

$\text { Find the class with the greatest number of data values. }$