Basic Statistics Flashcard

Front

What is a percentile?

Back

A percentile is a measure used in statistics indicating the value below which a given percentage of observations in a group of observations falls.

Front

How do you calculate the percentile rank of a value in a data set?

Back

To calculate the percentile rank of a value, use the formula: (Number of values below the given value / Total number of values) * 100.

Front

What is the first step in finding the median of a data set?

Back

Put the numbers in order from least to greatest.

Front

What is the median?

Back

The median is the middle value in a data set when the numbers are arranged in order.

Front

How do you find the mean (average) of a data set?

Back

To find the mean, add all the numbers together and then divide by the total number of values.

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.

Front

What does it mean if a data set has more than one mode?

Back

If a data set has more than one mode, it is called multimodal, meaning there are multiple values that occur with the highest frequency.

Front

True or False: A data set can have more than one median value.

Back

False. A data set can have only one median value.

Front

What is a dot plot?

Back

A dot plot is a simple way to display data using dots to represent the frequency of values.

Front

How do you determine the mode of a data set?

Back

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