Exam 2: Summarizing Data: Listing and Grouping

It is possible for the class boundaries of an interval to be the same as its class limits.

For the data below, construct a frequency histogram and a frequency polygon.

For the data below, construct an ogive.

Table 1 A sample of 80 company employees is grouped into a table based on their weekly salaries: -From the data in Table 1, construct a cumulative "greater than" distribution.

A bar chart of a frequency distribution is called a _______.

The sum of the frequencies in a frequency distribution is equal to the number of elements in the sample.

In constructing a frequency distribution from raw data, there will usually be between _______ and _______ classes.

Table 1 A sample of 80 company employees is grouped into a table based on their weekly salaries: -From the data in Table 1, construct a percentage distribution.

At a dairy products convention, an interviewer asked 40 persons to name their favorite dairy product. Their replies were ice cream, butter, cheese, butter, butter, milk, butter, sour cream, ice cream, cheese, butter, cheese, milk, cheese, butter, cheese, ice cream, butter, milk, butter, sour cream, ice cream, cheese, milk, butter, ice cream, cheese, butter, milk, sour cream, butter, cheese, milk, butter, cheese, milk, ice cream, sour cream, ice cream, and ice cream. Draw a bar chart with vertical bars for these categorical data.

The following are three daily pizza sales in units for a local pizza restaurant for the past two weeks: $228,252,310,305,165,182,312,182,171,285,307,281,234,175$ -For this data, construct a stem-and-leaf display with one-digit leaves.

The grade point averages for 40 students are listed below. Construct an ogive using eight classes. 2.0 3.2 1.8 2.9 0.9 4.0 3.3 2.9 3.6 0.8 3.1 2.4 2.4 2.3 1.6 1.6 4.0 3.1 3.2 1.8 2.2 2.2 1.7 0.5 3.6 3.4 1.9 2.0 3.0 1.1 3.0 4.0 4.0 2.1 1.9 1.1 0.5 3.2 3.0 2.2

If two consecutive class intervals of a frequency distribution are 60-67 and 68-75, the class boundaries of the second interval are 68.95-75.95.

The heights (in inches) of 30 adult males are listed below. Construct a dot diagram for the data. 70 72 71 70 69 73 69 68 70 71 67 71 70 74 69 68 71 71 71 72 69 71 68 67 73 74 70 71 69 68

Solve the problem. -Given the class marks 22, 30, 38, and 46, provide (i) class boundaries and (ii) class limits for this frequency distribution.

A sample of 18 tries to connect to an online service using a phone line. -The class boundaries of the second class are

For an ogive, the horizontal axis should contain the class _______

A frequency distribution always has equal class intervals.

The heights (in inches) of 30 adult males are listed below. Construct a ogive using five classes. 70 72 71 70 69 73 69 68 70 71 67 71 70 74 69 68 71 71 71 72 69 71 68 67 73 74 70 71 69 68

List the data which correspond to the following stem-and-leaf display. $4 \left\lvert\, \begin{array}{lllll}72 & 51 & 36 & 23 & 95\end{array}\right.$

A sample of 18 tries to connect to an online service using a phone line. -The numbers 40 and 44 are examples of