Algebra I Chapter 11 Test Probability and Statistics

Front

What is the best measure of central tendency for a set of data with extreme values?

Back

Median is often the best measure of central tendency when there are extreme values, as it is less affected by outliers than the mean.

Front

What does a box and whisker plot show?

Back

A box and whisker plot displays the distribution of data based on a five-number summary: minimum, first quartile, median, third quartile, and maximum.

Front

How do you calculate the percentage of a specific group in a total population?

Back

To find the percentage, divide the number of individuals in the specific group by the total population and multiply by 100.

Front

What is the method to find the median of a data set?

Back

Put the numbers in order from least to greatest and find the middle number. If there is an even number of observations, average the two middle numbers.

Front

What does the mode of a data set represent?

Back

The mode is the number that occurs most frequently in a data set.

Front

What is the range of a data set?

Back

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

Front

What is a key characteristic of the median?

Back

The median divides a data set into two equal halves, with 50% of the data points below it and 50% above it.

Front

How can you interpret a box and whisker plot?

Back

A box and whisker plot allows you to see the spread of the data, identify outliers, and understand the central tendency.

Front

What is the significance of the first and third quartiles in a box and whisker plot?

Back

The first quartile (Q1) represents the 25th percentile, and the third quartile (Q3) represents the 75th percentile, indicating the spread of the middle 50% of the data.

Front

How do you determine if a data set is skewed?

Back

A data set is skewed if the mean and median are not equal; if the mean is greater than the median, it is positively skewed, and if the mean is less, it is negatively skewed.