Module 8 Quick Check

Front

What is a permutation?

Back

A permutation is an arrangement of objects in a specific order. The order matters.

Front

What is a combination?

Back

A combination is a selection of objects where the order does not matter.

Front

When would you use a permutation instead of a combination?

Back

Use a permutation when the arrangement or order of the selected items is important.

Front

What is standard deviation?

Back

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

Front

How do you calculate standard deviation from variance?

Back

Standard deviation is the square root of variance.

Front

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

Back

A low standard deviation indicates that the data points tend to be close to the mean.

Front

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

Back

A high standard deviation indicates that the data points are spread out over a wider range of values.

Front

If a data set has a mean of 10 and a standard deviation of 2, what range would you expect most data points to fall within?

Back

Most data points would fall within the range of 8 to 12 (mean ± 2 standard deviations).

Front

What is the formula for variance?

Back

Variance is calculated as the average of the squared differences from the mean.

Front

What is the relationship between mean, median, and mode in a normal distribution?

Back

In a normal distribution, the mean, median, and mode are all equal.