Statistics

Front

What is the mean in statistics?

Back

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

Front

How do you find the mode of a data set?

Back

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

Front

What is the median in a data set?

Back

The median is the middle number in a sorted list of numbers. If there is an even number of observations, the median is the average of the two middle numbers.

Front

What does it mean if a data set is skewed?

Back

A skewed data set is one that is not symmetrical, meaning that one tail is longer or fatter than the other. It can be positively skewed (right) or negatively skewed (left).

Front

What is a frequency distribution?

Back

A frequency distribution is a summary of how often each value occurs in a data set.

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 is a histogram?

Back

A histogram is a graphical representation of the distribution of numerical data, showing the frequency of data points within certain ranges.

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 interquartile range (IQR)?

Back

The interquartile range (IQR) is the difference between the first quartile (Q1) and the third quartile (Q3) and measures the spread of the middle 50% of the data.

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.