Probability and Two Way Frequency Tables

Front

What is probability?

Back

Probability is a measure of how likely an event is to occur, expressed as a number between 0 and 1, or as a percentage.

Front

What is a two-way frequency table?

Back

A two-way frequency table is a data display that shows the frequency of different combinations of two categorical variables.

Front

How do you calculate the percentage of a group?

Back

To calculate the percentage, divide the part by the whole and multiply by 100.

Front

What does it mean if an event has a probability of 0?

Back

It means the event is impossible and will not occur.

Front

What does it mean if an event has a probability of 1?

Back

It means the event is certain and will definitely occur.

Front

How can you find the total number of people surveyed from a two-way table?

Back

Add all the frequencies in the table to find the total number of people surveyed.

Front

What is the formula for finding the probability of an event?

Back

Probability = (Number of favorable outcomes) / (Total number of outcomes).

Front

What is a categorical variable?

Back

A categorical variable is a variable that can take on one of a limited, fixed number of possible values, assigning each individual or other unit of observation to a particular group.

Front

How do you interpret the results of a two-way frequency table?

Back

You analyze the frequencies to understand the relationship between the two categorical variables.

Front

What is the significance of the total row and column in a two-way table?

Back

The total row and column provide the overall counts for each category, helping to summarize the data.