Math 1 Unit 1 Review

Front

What is the median in a data set?

Back

The median is the middle value when the data set is ordered from least to greatest. If there is an even number of observations, the median is the average of the two middle numbers.

Front

What is the interquartile range (IQR)?

Back

The interquartile range (IQR) is a measure of variability that describes the range of the middle 50% of a data set. It is calculated as the difference between the third quartile (Q3) and the first quartile (Q1).

Front

When should you use the mean as a measure of center?

Back

The mean is best used when the data distribution is symmetrical and there are no outliers, as it takes all values into account.

Front

When is the median a better measure of center than the mean?

Back

The median is a better measure of center when the data distribution is skewed or contains outliers, as it is not affected by extreme values.

Front

What does a box plot represent?

Back

A box plot visually represents the distribution of a data set, showing the median, quartiles, and potential outliers.

Front

How does a low score affect the mean of a data set?

Back

A low score decreases the mean of the data set, as it pulls the average down.

Front

What is the mode in a data set?

Back

The mode is the value that appears most frequently in a data set.

Front

What is the difference between the mean and median?

Back

The mean is the average of all values, while the median is the middle value when the data is ordered.

Front

What does it mean if a data set is skewed to the right?

Back

If a data set is skewed to the right, it has a longer tail on the right side, indicating that there are a few high values that are pulling the mean higher than the median.

Front

What is standard deviation?

Back

Standard deviation is a measure of the amount of variation or dispersion in a set of values. A low standard deviation means that the values tend to be close to the mean.