Front

What is a measure of variability?

Back

A measure of variability quantifies the extent to which data points in a dataset differ from each other. Common measures include range, variance, and standard deviation.

Tags

CCSS.6.SP.A.3

Front

What is standard deviation?

Back

Standard deviation is a statistic that measures the dispersion of a dataset relative to its mean. A low standard deviation indicates that data points tend to be close to the mean, while a high standard deviation indicates a wider spread.

Front

What percentage of data falls within one standard deviation of the mean in a normal distribution?

Back

Approximately 68% of the data falls within one standard deviation of the mean in a normal distribution.

Tags

CCSS.HSS.ID.A.4

Front

What percentage of data falls within two standard deviations of the mean in a normal distribution?

Back

Approximately 95% of the data falls within two standard deviations of the mean in a normal distribution.

Tags

CCSS.HSS.ID.A.4

Front

What is a normal distribution?

Back

A normal distribution is a probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean.

Front

What does it mean if a distribution is skewed left?

Back

A left-skewed distribution has a longer tail on the left side, indicating that there are a larger number of lower values compared to higher values.

Front

What is the formula for calculating the mean?

Back

The mean is calculated by summing all the values in a dataset and dividing by the number of values.

Tags

CCSS.6.SP.B.5C

Front

How do you find the height of an unknown student if the mean is known?

Back

To find the height of the unknown student, multiply the mean height by the total number of students, subtract the sum of the known heights, and solve for the unknown height.

Tags

CCSS.6.SP.B.5C

Front

What is variance?

Back

Variance is a measure of how far a set of numbers are spread out from their average value. It is the average of the squared differences from the mean.

Front

What is the range of a dataset?

Back

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

Tags

CCSS.6.SP.B.4

CCSS.HSS.ID.A.1