Statistics Practice

Front

What is the interquartile range (IQR)?

Back

The interquartile range (IQR) is a measure of statistical dispersion, representing the difference between the third quartile (Q3) and the first quartile (Q1) in a data set.

Front

How do you calculate the mean of a data set?

Back

To calculate the mean, sum all the values in the data set and then divide by the number of values.

Front

What is a box plot?

Back

A box plot is a graphical representation of a data set that displays the median, quartiles, and potential outliers.

Front

What does the third quartile (Q3) represent?

Back

The third quartile (Q3) represents the value below which 75% of the data falls.

Front

What is the mode of a data set?

Back

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

Front

What is the median of a data set?

Back

The median is the middle value when the data set is ordered from least to greatest.

Front

How do you find the percentage of a group?

Back

To find the percentage, divide the part by the whole and multiply by 100.

Front

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

Back

In a positively skewed distribution, mean > median > mode; in a negatively skewed distribution, mode > median > mean.

Front

What is a survey in statistics?

Back

A survey is a method of collecting data by asking questions to a group of people.

Front

What is a data set?

Back

A data set is a collection of related data points or values.