Dec 3 B4 Stats Ch 2.4 Measures of Variation

Front

What is the mean in a normal distribution?

Back

The mean is the average value of a set of data, representing the center of the distribution.

Front

What is standard deviation?

Back

Standard deviation is a measure of the amount of variation or dispersion in a set of values.

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.

Front

How do you calculate the standard deviation from variance?

Back

Standard deviation is the square root of the variance.

Front

What does a higher standard deviation indicate about a data set?

Back

A higher standard deviation indicates that the data points are more spread out from the mean.

Front

What is a skewed distribution?

Back

A skewed distribution is one where the data points are not symmetrically distributed around the mean.

Front

What does it mean if a distribution is skewed left?

Back

If a distribution is skewed left, it has a longer tail on the left side, indicating that there are more lower values.

Front

What is a bimodal distribution?

Back

A bimodal distribution has two different modes or peaks in the frequency of data.

Front

What is the difference between mean, median, and mode?

Back

Mean is the average, median is the middle value, and mode is the most frequently occurring value in a data set.

Front

What is a measure of variability?

Back

A measure of variability indicates how spread out the values in a data set are, examples include range and standard deviation.