IQR REVIEW

Front

What is the first quartile (Q1)?

Back

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

Front

What is the second quartile (Q2)?

Back

The second quartile (Q2) is the median of the data set, which divides the data into two equal halves.

Front

What is the third quartile (Q3)?

Back

The third quartile (Q3) is the value that separates the highest 25% of a data set from the rest. It is the median of the upper half of the data.

Front

How do you calculate the interquartile range (IQR)?

Back

The interquartile range (IQR) is calculated by subtracting the first quartile (Q1) from the third quartile (Q3): IQR = Q3 - Q1.

Front

What does the interquartile range (IQR) represent?

Back

The interquartile range (IQR) represents the range of the middle 50% of the data, providing a measure of statistical dispersion.

Front

What is the median of the data set: 4, 5, 6, 8, 9, 10, 11?

Back

The median is 8, which is the middle value of the ordered data set.

Front

What is the median of the data set: 32, 53, 72, 66, 47, 54, 49, 67, 71?

Back

The median is 54, which is the middle value of the ordered data set.

Front

What is the IQR of the data set: 32, 35, 35, 36, 39, 40, 44, 48, 49?

Back

The IQR is 11, calculated as Q3 (46) - Q1 (35).

Front

How many equal parts do quartiles divide a data set into?

Back

Quartiles divide a data set into 4 equal parts, each representing 25% of the data.

Front

What is the first quartile (Q1) of the data set: 4, 5, 6, 8, 9, 10, 11?

Back

The first quartile (Q1) is 5.