Shape Center Spread

Front

What is the definition of median in a data set?

Back

The median is the middle value of a data set when it is arranged in ascending or descending order. If there is an even number of observations, the median is the average of the two middle values.

Front

How do you find the maximum value in a data set?

Back

The maximum value is the largest number in the data set.

Front

What does it mean for data to be skewed right?

Back

Skewed right means that the tail on the right side of the distribution is longer or fatter than the left side, indicating that there are a few unusually high values.

Front

When should you use the median instead of the mean?

Back

The median should be used instead of the mean when the data set contains outliers or is skewed, as it provides a better measure of center.

Front

What is the upper quartile (Q3) in a data set?

Back

The upper quartile (Q3) is the median of the upper half of the data set, representing the 75th percentile.

Front

What is the definition of mean in a data set?

Back

The mean is the average of all the values in a data set, calculated by dividing the sum of all values by the number of values.

Front

What is the interquartile range (IQR)?

Back

The interquartile range (IQR) is the difference between the upper quartile (Q3) and the lower quartile (Q1), representing the range of the middle 50% of the data.

Front

How do you determine the lower quartile (Q1)?

Back

The lower quartile (Q1) is the median of the lower half of the data set, representing the 25th percentile.

Front

What is a box plot and what does it represent?

Back

A box plot is a graphical representation of a data set that shows the minimum, first quartile (Q1), median, third quartile (Q3), and maximum values.

Front

What is the relationship between skewness and the mean and median?

Back

In a right-skewed distribution, the mean is typically greater than the median, while in a left-skewed distribution, the mean is typically less than the median.