Basic 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 numbers together and dividing by the count of numbers.

Front

What does the term 'range' refer to in a data set?

Back

The range is the difference between the highest and lowest values in a data set.

Front

How do you calculate the median of a data set?

Back

To find the median, arrange the numbers in order and identify the middle number. If there is an even number of values, the median is the average of the two middle numbers.

Front

What is the mode in a data set?

Back

The mode is the number that appears most frequently 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

How do you identify outliers in a data set?

Back

Outliers are values that are significantly higher or lower than the majority of the data points. They can be identified using statistical methods or visual inspection.

Front

What is the difference between mean, median, and mode?

Back

Mean is the average, median is the middle value, and mode is the most frequently occurring value in a data set.

Front

What is a data set?

Back

A data set is a collection of related data points or values, often organized in a table or list.

Front

How can you describe the shape of a data distribution?

Back

The shape of a data distribution can be described as normal, skewed, uniform, or bimodal, based on how the data points are spread.

Front

What does it mean if a data set is skewed?

Back

A skewed data set has a distribution that is not symmetrical, with values concentrated on one side of the mean.