Chapter 12 Test Review Part 2

Front

What is the median in a data set?

Back

The median is the middle value when the numbers are arranged in order. If there is an even number of values, the median is the average of the two middle numbers.

Front

How do you find the interquartile range (IQR)?

Back

The IQR is found by subtracting the first quartile (Q1) from the third quartile (Q3). It measures the spread of the middle 50% of the data.

Front

What does a box-and-whisker plot represent?

Back

A box-and-whisker plot displays the distribution of a data set based on five summary statistics: minimum, first quartile (Q1), median, third quartile (Q3), and maximum.

Front

How do you determine the total number of items surveyed?

Back

To find the total number of items surveyed, sum all the individual responses or counts from the survey.

Front

What is a data range?

Back

The range of a data set is the difference between the highest and lowest values.

Front

What does it mean if a data point is an outlier?

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.

Front

How do you interpret survey results?

Back

Survey results can be interpreted by analyzing the frequency of responses and identifying trends or patterns in the data.

Front

What is the purpose of a box plot?

Back

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

Front

How can you calculate the number of items within a specific range?

Back

To calculate the number of items within a specific range, count all the values that fall between the lower and upper limits of that range.

Front

What is a frequency distribution?

Back

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