CHAPTER $2$ ASSIGNMENT

DESCRIBING DATA: FREQUENCY DISTRIBUTIONS AND GRAPHIC PRESENTATION

Un Sethvisa:

Section

Score

I Select the correct answer and write the appropriate letter in the space provided

A grouping of data into categories giving the number of observations in each category is called $a($an$)$

a bar chart.

b$.$ frequency distribution.

c$.$ pie chart.

d$.$ cumulative frequency distribution.

The distance between consecutive lower class limits is called the

a$.$ class interval.

b$.$ frequency distribution.

c$.$ class midpoint.

d$.$ class frequency.

The class midpoint is

a$.$ equal to the number of observations.

b$.$ found by adding the upper and lower class limit and dividing by $2.$

c$.$ equal to the class interval.

d$.$ all of the above.

The number of observations in a particular class is called the

a$.$ class interval.

b$.$ class frequency.

c$.$ frequency distribution.

d$.$ none of the above.

A bar chart is used most often when

a$.$ you want to show frequencies as compared to total observations.

b$.$ you want to show frequencies by class intervals.

c$.$ you want to display frequencies by category.

d$.$ you want to organize data along certain time interval.

In a relarive frequency distribution

a$.$ the class frequencies are divided by $100.$

b$.$ the data are related to each other rather than mutually exclusive.

c$.$ the class frequency is divided by the total number of observations.

d$.$ the frequencies are added together to give a relative set of numbers.

Chapter $2$