Basic Statistics Test

Front

What is the mean in a data set?

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 happens to the mean if a value greater than the current mean is added to the data set?

Back

The mean will increase.

Front

What is the median in a data set?

Back

The median is the middle value when the data set is ordered from least to greatest. If there is an even number of values, the median is the average of the two middle numbers.

Front

How do you find the range of a data set?

Back

The range is found by subtracting the smallest value from the largest value in the data set.

Front

What is the mode in a data set?

Back

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

Front

What is a stem-and-leaf plot?

Back

A stem-and-leaf plot is a method of displaying quantitative data in a graphical format, similar to a histogram, to retain the original data values.

Front

What does it mean if a data set is skewed?

Back

A skewed data set is one that is not symmetrical and has a tail on one side. If the tail is on the right, it is positively skewed; if on the left, it is negatively skewed.

Front

What is a box plot?

Back

A box plot is a standardized way of displaying the distribution of data based on a five-number summary: minimum, first quartile, median, third quartile, and maximum.

Front

What is a quartile?

Back

A quartile is a type of quantile that divides a ranked data set into four equal parts.

Front

What is the difference between descriptive and inferential statistics?

Back

Descriptive statistics summarize and describe the characteristics of a data set, while inferential statistics use a random sample of data to make inferences about a larger population.