Distribution Shapes and Outliers

Front

What is a bimodal distribution?

Back

A bimodal distribution is a probability distribution with two different modes, which can appear as distinct peaks in the frequency of data.

Front

What is the interquartile range (IQR)?

Back

The interquartile range (IQR) is a measure of statistical dispersion, calculated as the difference between the upper quartile (Q3) and lower quartile (Q1).

Front

How do you calculate the IQR if Q1 is 25 and Q3 is 45?

Back

IQR = Q3 - Q1 = 45 - 25 = 20.

Front

What does the 1.5 x IQR rule help identify?

Back

The 1.5 x IQR rule helps identify outliers in a data set.

Front

What is an outlier?

Back

An outlier is a value that is significantly higher or lower than the other values in a data set.

Front

What is a skewed right distribution?

Back

A skewed right distribution has a longer tail on the right side, indicating that the majority of the data points are concentrated on the left.

Front

What is a skewed left distribution?

Back

A skewed left distribution has a longer tail on the left side, indicating that the majority of the data points are concentrated on the right.

Front

What is a symmetric distribution?

Back

A symmetric distribution is one where the left and right sides of the distribution are mirror images of each other.

Front

What is a box plot?

Back

A box plot is a graphical representation of data that shows the distribution's minimum, first quartile, median, third quartile, and maximum.

Front

What is the purpose of a histogram?

Back

A histogram is used to represent the frequency distribution of numerical data by showing the number of data points that fall within specified ranges.