Chapter 2 LearnSmart

What graphical tool is best used to display the relative frequency of grouped, quantitative data? A. Histogram B. Ogive C. Bar chart D. Pie chart

A. Histogram

Which of the following graphical depictions displays cumulative data? A. Ogive B. Stem-and-leaf diagram C. Polygon D. Histogram E. Scatterplot

A. Ogive

When constructing a histogram, what value/labels go on the horizontal (x) axis and the vertical (y) axis? A. Quantitative class limits on the horizontal axis, frequency or relative frequency on the vertical axis B. Frequency or relative frequency on the horizontal axis; quantitative class limits on the vertical axis C. Histograms do not have vertical or horizontal axis; frequency or relative frequency on the vertical axis

A. Quantitative class limits on the horizontal axis, frequency or relative frequency on the vertical axis

Which of the following graphical depictions are useful to observe the shape (distribution) of a data set for a single variable? A. Stem-and-leaf diagram B. Scatterplot C. Polygon D. Histogram

A. Stem-and-leaf diagram C. Polygon D. Histogram

Which of the following statements is LEAST accurate? A. The height of each rectangle represents cumulative frequency or cumulative relative frequency B. The rectangles of a histogram represent the class width and frequency, or relative frequency, of the respective class. C. The rectangles of a histogram represent grouped data D. The rectangles of a histogram are drawn with no space, or gaps, between them

A. The height of each rectangle represents cumulative frequency or cumulative relative frequency

When constructing classes for a frequency distribution for quantitative data, which of the following statements is least accurate? A. The number of classes should equal the number of observations B. In general, the classes should be the same width C. The classes should be exhaustive D. The classes should be mutually exclusive

A. The number of classes should equal the number of observations

Relative frequency distributions are generally more useful than frequency distributions when A. comparing data sets of different sizes B. comparing large data sets of the same size C. comparing small data sets of the same size

A. comparing data sets of different sizes

A _________ is a way to organize qualitative data into categories and record the number of observations in each category. A. frequency distribution B. polygon C. scatterplot D. correlation coefficient

A. frequency distribution

For quantitative data, a ___________ groups data into classes and records the number of observations that falls into each class. A. frequency distribution B. scatterplot C. pie chart D. bar chart

A. frequency distribution

A(n) _________ is a segmented circle whose segments portray the relative frequencies of the categories of some qualitative variable. A. pie chart B. histogram C. ogive D. bar chart

A. pie chart

There are several guidelines to follow when constructing graphs that summarize statistical data. Which of the following statements is least accurate? A. Axes should be clearly labeled B. Axes that are numerical should be to the appropriate scale C. Graphs should have a lot of adornments D. The simplest graph that effectively communicates the data should be used

C. Graphs should have a lot of adornments

Which of the following graphical depictions allows you to examine the relationship between two variables? A. Histogram B. Scatterplot C. Ogive D. Stem-and-leaf diagram E. Polygon

B. Scatterplot

A(n) ____________ depicts the frequency or the relative frequency for each category of a qualitative variable as a series of horizontal or vertical bars, the lengths of which are proportional to the values that are to be depicted. A. polygon B. bar chart C. pie chart D. ogive

B. bar chart

In descriptive statistics, a polygon is best described as: A. graph that plots the cumulative frequency or relative cumulative frequency of each class against the upper limit B. graph that connects the midpoints of each class and its associated frequency or relative frequency C. series of horizontal or vertical bars used to depict a qualitative variable D. segmented circle used to depict a qualitative variable

B. graph that connects the midpoints of each class and its associated frequency or relative frequency

When constructing a histogram, what values/labels go on the horizontal (x) axis and the vertical (y) axis? A. Histograms do not have vertical or horizontal axes B. Qualitative categories on the horizontal axis; frequency or relative frequency on the vertical axis C. Quantitative class limits on the horizontal axis; frequency or relative frequency on the vertical axis D. Frequency or relative frequency on the horizontal axis; quantitative class limits on the vertical axis

C. Quantitative class limits on the horizontal axis; frequency or relative frequency on the vertical axis

Assume that a professor gave an exam to a class of 50 students. The high score was 98 points and the low score was 48 points. The professor wants to create a frequency distribution that is divided into 5 classes for the exam scores. The class width for the data is approximately _________ points. A. 15 B. 20 C. 10 D. 5

C. 10

When constructing classes for a frequency distribution for quantitative data, which of the following statements is least accurate? A. The classes should be exhaustive B. In general, the classes should be the same width C. The number of classes should equal the number of observations D. The classes should be mutually exclusive

C. The number of classes should equal the number of observations

When constructing a graph, which of the following statements is most accurate? A. The vertical axis should be stretched so that an increase (or decrease) of the data appears pronounced B. It is common to give the vertical axis a very high value as an upper limit C. The simplest graph should be used for a given set of data

C. The simplest graph should be used for a given set of data

One of the primary goals when constructing a frequency distribution for quantitative data is to summarize the data in a manner that: A. maintains the same number of data points in each class B. ensures that there are seven classes where each class is of width one C. accurately depicts the data as a whole

C. accurately depicts the data as a whole

One method of graphical presentation for qualitative data is a: A. scatterplot B. stem-and-leaf diagram C. bar chart D. histogram

C. bar chart

When a researcher examines quantitative data and wants to know the number of observations that fall below the upper limit of a particular class, the researcher is best served by creating a: A. relative frequency distribution B. bar chart C. cumulative frequency distribution D. pie chart

C. cumulative frequency distribution

A relative frequency distribution for quantitative data identifies the: A. proportion of observations that occur below the upper limit of a particular class B. number of observations that occur below the upper limit of a particular class C. proportion of observations that occur in each class D. number of observations that occur in each class

C. proportion of observations that occur in each class

A new dining plan was implemented in a residence hall at State University. Residents were asked to assess the new plan and give a grade of A, B, C, D, or F to the new dining plan. Of 480 residents, 234 gave a grade of B, 85 a grade of C, 13 a grade of D, and 4 a grade of F. The proportion of grades designated as A were ____________. A. 246 B. 144 C. 0.70 D. 0.30

D. 0.30

A new dining plan was implemented in a residence hall at State University. Residents were asked to assess the new plan and give a grade of A, B, C, D, or F to the new dining plan. Of 482 residents, 234 gave a grade of A, 148 a grade of B, 87 a grade of C, and 9 a grade of D. There were ______ "F"s. A. 10 B. 6 C. 8 D. 4

D. 4

How does an ogive differ from a polygon? A. An ogive is a graph of a (relative) frequency distribution, while a polygon is a graph of a cumulative (relative) frequency distribution. B. An ogive is used for quantitative data, while a polygon is used for qualitative data C. An ogive is used for qualitative data, while a polygon is used for quantitative data D. An ogive is a graph of a cumulative (relative) frequency distribution, while a polygon is a graph of a (relative) frequency distribution.

D. An ogive is a graph of a cumulative (relative) frequency distribution, while a polygon is a graph of a (relative) frequency distribution.

There are several guidelines to follow when constructing graphs that summarize statistical data. Which of the following statements is least accurate? A. The simplest graph that effectively communicates the data should be used B. Axes that are numerical should be to the appropriate scale C. Axes should be clearly labeled D. Graphs should have a lot fo adornments

D. Graphs should have a lot fo adornments

(refer to question 14 photo) Based on the pictured histogram the distribution of the data can best be described as: A. uniform B. symmetrical C. negatively skewed, or skewed left D. positively skewed, or skewed right

D. positively skewed, or skewed right

(refer to question 10 photo) Consider the following cumulative frequency distribution. How many observations are less than 35? A. 20 B. 30 C. 70 D. 120 E. 50

E. 50