Statistics Unit Review

Front

What is the mean of a data set?

Back

The mean is the average of a set of numbers, calculated by adding all the values together and dividing by the number of values.

Front

What happens to the mean if a value greater than the current mean is added to the data set?

Back

The mean will increase.

Front

Write the exponential equation for a decay function with a starting value of 4 and a decay factor of 1/2.

Back

Front

What is a scatterplot?

Back

A scatterplot is a graph that shows the relationship between two quantitative variables, using dots to represent data points.

Front

What does a strong correlation in a scatterplot indicate?

Back

A strong correlation indicates a strong relationship between the two variables, meaning as one variable changes, the other variable tends to change in a predictable way.

Front

What is the median of a data set?

Back

The median is the middle value when the numbers are arranged in order. If there is an even number of values, the median is the average of the two middle numbers.

Front

How do you determine which class has a higher median?

Back

Compare the middle values of the ordered data sets for each class.

Front

What does it mean if a relationship is described as positive but not causal?

Back

It means that as one variable increases, the other variable also increases, but one does not directly cause the other.

Front

What is a causal relationship?

Back

A causal relationship means that one variable directly affects or causes a change in another variable.

Front

What is the difference between correlation and causation?

Back

Correlation indicates a relationship between two variables, while causation indicates that one variable directly influences the other.