Statistics and Data Analysis Flashcard

Front

What is the definition of 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

How do you calculate the median of a set of numbers?

Back

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

Front

What is mode in statistics?

Back

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

Front

How do you find the range of a set of numbers?

Back

The range is calculated by subtracting the smallest number in the set from the largest number.

Front

What is the formula for calculating the mean?

Back

Mean = (Sum of all values) / (Number of values).

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

How do you identify the mode in a data set with no repeating numbers?

Back

If no number repeats, the data set is said to have no mode.

Front

What is the significance of the median in a data set?

Back

The median provides a measure of central tendency that is less affected by outliers than the mean.

Front

How can you determine if a data set is skewed?

Back

A data set is skewed if the mean and median are not equal; if the mean is greater than the median, it is positively skewed, and if the mean is less than the median, it is negatively skewed.

Front

What is an outlier in a data set?

Back

An outlier is a value that is significantly higher or lower than the other values in a data set.