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Exam 2: Frequency Distributions and Graphs

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Question 31

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

A) pie graph
B) pictograph
C) time series graph
D) ogive

E) B) and C)
F) C) and D)

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Question 32

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

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Question 33

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

Which of the following is a histogram?

Construct a pie graph using the following data from the local $\begin{array}{|l|l|}\hline \text { Cookie Types } & \text { Number Sold } \\\hline \text { Chocolate Chip } & 20 \\\hline \text { Peanut Butter } & 15 \\\hline \text { Oatmeal } & 30 \\\hline \text { Sugar } & 10 \\\hline\end{array}$ bakery.

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

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.

An ogive graph is also called a cumulative frequency graph.

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

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

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

Which of the following is a Pareto chart?

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

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

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

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

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

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

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

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