Quartiles

What does Q1 represent?

• The first quartile, which is the median of the lower half of the data set.

• The average of all data points in a set.

• The highest value in a data set.

• The lowest value in a data set.

How many quartiles are there in a data set?

• Two quartiles

• Three quartiles

• Four quartiles

• Five quartiles

What does Q2 represent?

• The first quartile of the data set.

• The third quartile of the data set.

• The median of the entire data set.

• The range of the data set.

True or False: Quartiles divide a data set into four equal parts.

• True

• False

• Sometimes

• Only in large data sets

If a data set has an even number of values, how do you find the median?

• The median is the first number in the data set.

• The median is the average of the two middle numbers.

• The median is the largest number in the data set.

• The median is the smallest number in the data set.

Find the median of these numbers: 4, 2, 7, 4, 3.

• 3

• 4

• 5

• 6

What does Q3 represent?

• The first quartile, which is the median of the lower half of the data set.

• The third quartile, which is the median of the upper half of the data set.

• The average of all data points in the set.

• The maximum value in the data set.

What is a quartile?

• A value that divides a data set into four equal parts.

• A measure of central tendency that represents the middle value.

• A statistical term used to describe the range of a data set.

• A type of graph used to display data distributions.

Why are quartiles important in statistics?

• They provide a measure of central tendency.

• They help to understand the distribution of data and identify outliers.

• They are used to calculate the mean of a dataset.

• They represent the total number of data points.

What is the formula to calculate the position of Q1?

• Position of Q1 = (n - 1) / 4

• Position of Q1 = (n + 1) / 4

• Position of Q1 = n / 4

• Position of Q1 = (n + 2) / 4