EDstats 3.2A Practice Two Way Tables

Front

What is a two-way table?

Back

A two-way table is a statistical table that displays the frequency distribution of two categorical variables, allowing for the analysis of the relationship between them.

Front

How do you calculate the total number of surveyed individuals in a two-way table?

Back

To calculate the total number of surveyed individuals, sum the frequencies in each cell of the two-way table.

Front

What does the term 'conditional probability' mean?

Back

Conditional probability is the probability of an event occurring given that another event has already occurred.

Front

How do you find the probability of an event using a two-way table?

Back

To find the probability of an event, divide the frequency of the event by the total number of surveyed individuals.

Front

What is the formula for calculating conditional probability?

Back

P(A|B) = P(A and B) / P(B), where P(A|B) is the probability of A given B.

Front

What is the probability of choosing a female from a two-way table with 16 females surveyed?

Back

The probability of choosing a female is calculated as the number of females divided by the total surveyed individuals.

Front

If 7 out of 16 girls skip breakfast, what is the probability that a randomly selected girl skips breakfast?

Back

The probability is 7/16 or approximately 43.75%.

Front

What does it mean if the probability of an event is 35%?

Back

It means that there is a 35% chance that the event will occur when the conditions are met.

Front

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

Back

Results can be interpreted by analyzing the frequencies and probabilities to understand the relationship between the two 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 understand the distribution of data.