Question 1

A pie chart shows the relative frequency in each class.

Accepted Answer

A pie chart is a type of graph that displays data in a circular shape and shows the relative frequency or proportion of each category. Each category is represented by a slice of the pie, and the size of the slice indicates the proportion of that category in relation to the other categories. Therefore, a pie chart is used to visualize the relative frequency or proportion of each class.

Question 2

A suggested class interval can be determined by the formula:

Accepted Answer

True

Question 3

When constructing a frequency distribution,try to include overlapping stated class limits,such as 100 up to 201,200 up to 301,and 300 up to 401.

Accepted Answer

Overlapping class limits can cause confusion and inaccuracies in data interpretation, as a single data point could fall into more than one class.

Question 4

When a frequency distribution is exhaustive,each individual,object,or measurement from a sample or population must appear in at least one category.

Accepted Answer

An exhaustive frequency distribution means that every individual, object, or measurement from a sample or population is accounted for and appears in at least one category. Therefore, the statement is true.

Question 5

A pie chart shows the number of observations in each class.

Accepted Answer

A pie chart shows the proportion or percentage of each category relative to the whole, not the number of observations.

Question 6

To construct a histogram,the class frequencies are plotted on the vertical or Y-axis and either the stated limits,the true limits or the midpoints are plotted on the horizontal or X-axis.

Accepted Answer

This is a true statement.

Question 7

A frequency distribution for qualitative data shows the number of observations in each class.

Accepted Answer

A frequency distribution for qualitative data shows the number of observations in each class or category.

Question 8

A frequency distribution for quantitative data has class limits.

Accepted Answer

A frequency distribution for quantitative data does have class limits, which divide the data into non-overlapping categories or groups. These class limits help to define the range of values that are included in each class, making it easier to organize and analyze the data.

Question 9

In constructing a frequency distribution,you should try to have open-ended classes such as "Under $100" and "$1,000 and over".

Accepted Answer

It is generally recommended to use closed-ended classes in constructing frequency distributions, where each class has a specific upper and lower limit. Open-ended classes can lead to ambiguity and uneven class intervals, making the distribution difficult to interpret and analyze.

Question 10

A frequency distribution for qualitative data has class limits.

Accepted Answer

The answer of A frequency distribution for qualitative data has...

Question 11

To construct a pie chart,relative class frequencies are used to graph the "slices" of the pie.

Accepted Answer

This is true. Pie charts are constructed using relative class frequencies, which show what proportion each class represents out of the total data set. These relative frequencies are then used to determine the size of each "slice" in the pie chart.

Question 12

In frequency distributions,classes are mutually exclusive if each individual,object,or measurement is included in only one category.

Accepted Answer

Classes in a frequency distribution are mutually exclusive if each individual or measurement only falls into one category, and not multiple categories. This ensures that the data is not double-counted and accurately reflects the distribution of the population being studied.

Question 13

To summarize the gender of students attending a college,the number of classes in a frequency distribution depends on the number of students.

Accepted Answer

The number of classes in a frequency distribution is determined by the range of the data and the desired width of the classes, regardless of the number of students.

Question 14

To convert a frequency distribution to a relative frequency distribution,divide each class frequency by the sum of the class frequencies.

Accepted Answer

This is the correct method for converting a frequency distribution to a relative frequency distribution.

Question 15

A class interval,which is the width of a class,can be determined by subtracting the lower limit of a class from the lower limit of the next higher class.

Accepted Answer

This statement is true. The class interval is the difference between the lower limit of a class and the lower limit of the next higher class.

Question 16

A pie chart is similar to a relative frequency distribution.

Accepted Answer

Both a pie chart and a relative frequency distribution show the proportion or percentage of different categories or values within a data set.

Question 17

To summarize the gender of students attending a college,a frequency distribution groups data into two classes.

Accepted Answer

True, since gender will be classified into two categories - male and female.

Question 18

The midpoint of a class,which is also called a class mark,is halfway between the lower and upper limits.

Accepted Answer

The definition of midpoint or class mark is that it is the exact halfway point between the lower and upper limits of a class. So, the statement is true.

Question 19

To convert a frequency distribution to a relative frequency distribution,divide each class frequency by the number of classes.

Accepted Answer

To convert a frequency distribution to a relative frequency distribution, divide each class frequency by the total number of data points (not the number of classes).

Question 20

A frequency distribution groups data into classes showing the number of observations in each class.

Accepted Answer

This is the definition of a frequency distribution.

Quiz 2: Describing Data: Frequency Distributions and Graphic Presentations