Math 1 Unit 9 Statistics Review

Front

What is the mean in statistics?

Back

The mean is the average of a set of numbers, calculated by adding all the values together and dividing by the number of values.

Front

What is standard deviation?

Back

Standard deviation is a measure of the amount of variation or dispersion in a set of values. A low standard deviation means that the values tend to be close to the mean, while a high standard deviation means that the values are spread out over a wider range.

Front

What does it mean if data is normally distributed?

Back

If data is normally distributed, it means that the values are symmetrically distributed around the mean, forming a bell-shaped curve.

Front

How do you calculate the percentage of data under a certain value in a normal distribution?

Back

To find the percentage of data under a certain value, you can use the Z-score formula and refer to the standard normal distribution table.

Front

What is a Z-score?

Back

A Z-score indicates how many standard deviations an element is from the mean. It is calculated as (X - mean) / standard deviation.

Front

How do you find the mean of a set of test scores?

Back

Add all the test scores together and divide by the number of scores.

Front

What is the median?

Back

The median is the middle value in a list of numbers. To find it, arrange the numbers in order and select the middle one.

Front

What is the mode?

Back

The mode is the value that appears most frequently in a data set.

Front

How do you determine how many students scored above the mean?

Back

Calculate the mean of the scores, then count how many scores are greater than the mean.

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.