Measure of Center and Spread

Front

What is the first quartile (Q1) in a data set?

Back

The first quartile (Q1) is the value that separates the lowest 25% of the data from the rest. It is the median of the lower half of the data set.

Front

How does adding a number in the middle of a data set affect the range?

Back

Adding a number in the middle of the data set does not affect the range; it stays the same.

Front

Which measure of center is not affected by extreme values?

Back

Median is not affected by extreme values.

Front

Which measure of center is affected by extreme values?

Back

Mean is affected by extreme values.

Front

What does it mean if the mean is greater than the median in a data set?

Back

It indicates that the data set is skewed right (positively skewed).

Front

What does it mean if the mean is less than the median in a data set?

Back

It indicates that the data set is skewed left (negatively skewed).

Front

What is the mode in a data set?

Back

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

Front

What is the range of a data set?

Back

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

Front

How do you calculate the median of a data set?

Back

To find the median, arrange the data in ascending order and locate the middle value. If there is an even number of values, the median is the average of the two middle values.

Front

What is the second quartile (Q2) in a data set?

Back

The second quartile (Q2) is the median of the entire data set, dividing it into two equal halves.