Exam 2: Describing Data: Frequency Distributions and Graphic Presentations

Refer to the following wage breakdown for a garment factory. What are the class limits for the class with the smallest frequencies?

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

Refer to the following distribution of ages: For the distribution of ages above,what is the relative class frequency for the lowest class?

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

Refer to the following frequency distribution on days absent during a calendar year by employees of a manufacturing company: How many employees were absent more than six days or more?

Refer to the following distribution of commissions: What is the relative frequency of those salespersons that earn more than $1,599?

A small sample of computer operators shows monthly incomes of $1,950,$1,775,$2,060,$1,840,$1,795,$1,890,$1,925 and $1,810.What are these ungrouped numbers called?

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

For the following distribution of heights,what are the limits for the class with the greatest frequency?

Draw a bar graph that illustrates the frequency table above.

Refer to the following distribution: What is the class midpoint for the $45 up to $55 class?

Unorganized data is referred to as ________ data.

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

A table showing the number of observations that have been grouped into each of several classes is called a _____________________.

Refer to the following frequency distribution on days absent during a calendar year by employees of a manufacturing company: How many employees were absent fewer than six days?

Refer to the following distribution of ages: What is the class midpoint of the highest class?

A pie chart shows the relative frequency in each class.

What chart or graph is useful to display a relative frequency distribution for a nominal variable? _______________________

A frequency distribution for nominal data requires that the categories be ___________________ and _______________________.

The midpoint of a class interval is also called a __________.