Critical Concepts & Data Analysis

Front

What is the mean in data analysis?

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

How do you calculate the mean of a data set?

Back

Add all the numbers in the data set and divide by the total number of values.

Front

What is standard deviation?

Back

Standard deviation is a measure of the amount of variation or dispersion in a set of values.

Front

Which data set has the largest standard deviation: {3, 3, 4, 5, 5}, {72, 73, 74, 75, 76}, {2, 8, 18, 26, 35}, or {8, 10, 12, 14, 16}?

Back

{2, 8, 18, 26, 35} has the largest standard deviation.

Front

What does it mean if a sample is biased?

Back

A biased sample is one that does not accurately represent the population from which it is drawn.

Front

What is the median in data analysis?

Back

The median is the middle value in a data set when the numbers are arranged in order.

Front

What is the mode in data analysis?

Back

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

Front

Which measure of central tendency is most affected by outliers?

Back

The mean is most affected by outliers.

Front

How do you calculate the range of a data set?

Back

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

Front

What is the range of the heights: 69, 70, 72, 72, 74, 74, 74, 75, 76, 76, 76, 77, 77, 82?

Back

The range is 13.