Math 8 SOL Review

Front

What is the Interquartile Range (IQR)?

Back

The Interquartile Range (IQR) is a measure of statistical dispersion, representing the range between the first quartile (Q1) and the third quartile (Q3) in a data set. It is calculated as IQR = Q3 - Q1.

Front

How do you calculate the percent of change?

Back

Percent of change is calculated using the formula: Percent Change = ((New Value - Old Value) / Old Value) * 100. For example, if the old value is 72 and the new value is 36, the percent change is ((36 - 72) / 72) * 100 = -50%.

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always congruent (equal in measure).

Front

What is the property of vertical angles?

Back

Vertical angles are always congruent, meaning they have equal measures.

Front

What does each section of a box and whisker plot represent?

Back

Each section of a box and whisker plot represents 25% of the data set, dividing the data into four equal parts.

Front

Define quartiles in a data set.

Back

Quartiles are values that divide a data set into four equal parts. The first quartile (Q1) is the median of the lower half, the second quartile (Q2) is the median of the data set, and the third quartile (Q3) is the median of the upper half.

Front

What is a box and whisker plot?

Back

A box and whisker plot is a graphical representation of a data set that shows its minimum, first quartile, median, third quartile, and maximum.

Front

How do you find the median of a data set?

Back

To find the median, arrange the data in ascending order and locate the middle value. If there is an even number of values, the median is the average of the two middle values.

Front

What is the difference between mean and median?

Back

The mean is the average of all values in a data set, while the median is the middle value when the data is ordered. The mean can be affected by outliers, whereas the median is more robust.

Front

What is a percent decrease?

Back

A percent decrease is a reduction in value expressed as a percentage of the original value. It is calculated using the formula: Percent Decrease = ((Old Value - New Value) / Old Value) * 100.