Stats: Lesson 1.3 - GOOD

Front

What is an outlier in a data set?

Back

An outlier is a data point that differs significantly from other observations in a data set. It can skew the results of statistical analyses.

Front

What effect does removing an outlier have on the mean of a data set?

Back

Removing an outlier typically decreases the mean of the data set if the outlier is significantly higher than the other values.

Front

How do you find the median of a data set?

Back

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

Front

What is the median of the following numbers: 60, 58, 52, 48, 60, 67?

Back

The median is 59.

Front

What does IQR stand for in statistics?

Back

IQR stands for Interquartile Range, which measures the spread of the middle 50% of a data set.

Front

How is the IQR calculated?

Back

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

Front

What is the purpose of a boxplot?

Back

A boxplot visually represents the distribution of a data set, highlighting the median, quartiles, and potential outliers.

Front

What is the median score if the scores are: 39, 50, 55, 16?

Back

The median score is 50.

Front

What is the difference between mean and median?

Back

The mean is the average of all data points, while the median is the middle value when data points are arranged in order.

Front

What does standard deviation measure?

Back

Standard deviation measures the amount of variation or dispersion in a set of values.