Exam 3: Vive La Différence: Understanding Variability

When reporting descriptive data such as the mean, what additional information should also be reported that expresses how different the scores are in the distribution?

Which of the following measures how scores differ from each other?

What is the mean for the following set of scores: 20, 24, 26, 22, 18, 16, 18?

Which of the following must also be known in order to compute the standard deviation?

What is the variance for the following set of scores: 20, 24, 26, 22, 18, 16, 18?

The sum of the absolute value of the deviations from the mean divided by the number of scores is equal to the _______.

The variance of a group of scores is 4.What is the standard deviation?

As your sample size grows larger, the n − 1 adjustment for the standard deviation has a ______.

Biased estimates can be used ______.

What is the range for the following set of scores: 117, 249, 326, 47, 442?

It is possible for a set of data to have no variability.

If you have a variance of 9, your standard deviation will be _______.

Which of the following is one way to represent the variance?

What is the most common measure of variability?

If Σ(X − M)² = 235, and n = 29, what is s?

What is the range for the following set of scores: 34, 14, 17, 57, 22?

What is the standard deviation for the following set of scores: 20, 24, 26, 22, 18, 16, 18?

Which of the following is NOT a measure of variability?

What is the formula for calculating the exclusive range?

What is the range for the following set of scores: 20, 24, 26, 22, 18, 16, 18?