Statistical Measures

Front

What is a measure of center?

Back

A measure of center is a statistical value that represents the center point or typical value of a dataset. Common measures include the mean, median, and mode.

Front

Define mean.

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

Define median.

Back

The median is the middle value in a dataset when the numbers are arranged in ascending or descending order.

Front

Define mode.

Back

The mode is the value that appears most frequently in a dataset.

Front

What is a measure of spread?

Back

A measure of spread indicates how much the values in a dataset vary. Common measures include range, interquartile range (IQR), and standard deviation.

Front

Define range.

Back

The range is the difference between the highest and lowest values in a dataset.

Front

Define interquartile range (IQR).

Back

The IQR is the difference between the first quartile (Q1) and the third quartile (Q3) in a dataset, representing the middle 50% of the data.

Front

What is standard deviation?

Back

Standard deviation is a measure of how spread out the values in a dataset are around the mean.

Front

What does it mean if data is skewed left?

Back

If data is skewed left, it means that the left tail of the distribution is longer or fatter than the right tail, indicating that there are a few lower values.

Front

What does it mean if data is skewed right?

Back

If data is skewed right, it means that the right tail of the distribution is longer or fatter than the left tail, indicating that there are a few higher values.