Exam 3: Graphical Descriptive Techniques II

A line chart showing the number of crimes in Las Vegas from 2000 to 2005 may exhibit a totally different trend than a line chart showing the crime rate in Las Vegas from 2000 to 2005.(Crime rate is defined as number of crimes per 100,000 people.)

Which of the following describes an ogive?

When two variables are linearly related, and tend to move in opposite directions, we describe the nature of their association as a negative linear relationship.

A line chart that is flat shows no fluctuation in the variable being presented.

A stem-and-leaf display represents nominal data.

What kind(s) of data can be depicted by a line chart?

The intervals (classes) in a histogram are equally wide.

A(n) ____________________ histogram is one with a long tail extending to either the right or the left.

A(n) ____________________ is created by plotting the value of the variable on the vertical axis and the time periods on the horizontal axis.

A line chart is created by plotting the values of the variable on the vertical axis and the time periods on the horizontal axis.

The sum of the relative frequencies for all classes in a histogram always equals

What are the two most important characteristics to look for in a scatter diagram?

Internet Classes A survey of 25 students was conducted to determine how they rate the quality of Internet classes.Students were asked to rate the overall quality from 0 (no quality at all) to 100 (extremely good quality).The stem-and-leaf display of the data is shown below. -{Internet Classes Narrative} What percentage of the students rated the overall quality of on-line classes as being between 50 and 75, inclusive?

Thirty voters participating in a recent election exit poll in Alabama were asked to state their political party affiliation.Coding the data 1 for Republican, 2 for Democrat, and 3 for Independent, the data collected were as follows: 3, 1, 2, 3, 1, 3, 3, 2, 1, 3, 3, 2, 1, 1, 3, 2, 3, 1, 3, 2, 3, 2, 1, 1, 3, 1, 2, 2, 1, and 3.Develop a frequency distribution and a relative frequency distribution for this data.What does the data suggest about the strength of the political parties in Alabama?

The largest value of a cumulative relative frequency is ____________________.

Teachers Ages The ages (in years) of a sample of 25 teachers are as follows: -{Teachers Ages Narrative} Draw a frequency histogram of this data which contains four classes.What is the shape of the histogram?

Which of the following describes the shape of the histogram below?

A histogram is said to be symmetric if, when we draw a vertical line down the center of the histogram the two sides are nearly identical.

A stem-and-leaf display reveals more information about the original data than does a histogram.

Which of the following statements is false?