Keystone Prep Probability Review

Front

What is the lower quartile (Q1)?

Back

The lower quartile (Q1) is the value that separates the lowest 25% of a data set from the rest. It is the median of the lower half of the data.

Front

What does a box and whisker plot represent?

Back

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

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 values, it is the average of the two middle values.

Front

What is the mode of a data set?

Back

The mode is the value that appears most frequently in a data set. A data set can have one mode, more than one mode, or no mode at all.

Front

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

Back

The minimum value is the smallest number in the data set.

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 is the interquartile range (IQR)?

Back

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

Front

What is a data set?

Back

A data set is a collection of related values or observations, often organized in a table or list.

Front

What is a frequency distribution?

Back

A frequency distribution is a summary of how often each value occurs in a data set.

Front

What is an outlier in a data set?

Back

An outlier is a value that is significantly higher or lower than the other values in a data set, which can skew the results.