Unit 5: Data Review

Front

What is a scatterplot?

Back

A scatterplot is a graph that shows the relationship between two variables by displaying data points on a two-dimensional axis.

Front

What does it mean when a scatterplot shows a positive correlation?

Back

A positive correlation means that as one variable increases, the other variable also tends to increase.

Front

What is the Mean in statistics?

Back

The Mean is the average of a set of numbers, calculated by adding all the numbers together and dividing by the count of numbers.

Front

What is Mean Absolute Deviation (MAD)?

Back

Mean Absolute Deviation is a measure of the dispersion of a set of data points, calculated as the average of the absolute differences between each data point and the mean.

Front

How do you calculate the Mean?

Back

To calculate the Mean, sum all the values in the data set and divide by the number of values.

Front

How do you calculate the Mean Absolute Deviation?

Back

1. Find the Mean of the data set. 2. Subtract the Mean from each data point and take the absolute value. 3. Find the Mean of those absolute values.

Front

What is the purpose of using a scatterplot?

Back

Scatterplots are used to visually represent the relationship between two quantitative variables and to identify trends or patterns.

Front

What does it indicate if there is no correlation in a scatterplot?

Back

If there is no correlation, it indicates that changes in one variable do not predict changes in the other variable.

Front

What is the formula for calculating Mean Absolute Deviation?

Back

MAD = (Σ |x_i - Mean|) / N, where x_i represents each data point, Mean is the average, and N is the number of data points.

Front

What is an example of a positive correlation in real life?

Back

An example of a positive correlation is the relationship between hours studied and test scores; generally, more study time leads to higher scores.