Exam 4: Measures of Variability

The question below refers to the following situation: A university's administration is interested in understanding students' study habits. The School randomly surveys 13 students and asks them how much time per weeknight they Typically spend studying. The following are the responses in minutes: 60, 90, 120, 120, 150, 180, 180, 180, 180, 210, 240, 270, 300 Calculate the variance.

Scores that have a small standard deviation are relatively inconsistent.

The range and standard deviation are always identical.

The question below refers to the following situation: Below are two distributions of final scores for separate statistics courses. The first is from the Fall term, the second is from the Spring term. The variance for the Fall is __________.

The question below refers to the following situation: A university's administration is interested in understanding students' study habits. The School randomly surveys 13 students and asks them how much time per weeknight they Typically spend studying. The following are the responses in minutes: 60, 90, 120, 120, 150, 180, 180, 180, 180, 210, 240, 270, 300 Calculate the range.

The question below refers to the following situation: Below are two distributions of final scores for separate statistics courses. The first is from the Fall term, the second is from the Spring term. The mean for the Fall is __________.

The question below refers to the following situation: Below are two distributions of final scores for separate statistics courses. The first is from the Fall term, the second is from the Spring term. The variance for the Spring is __________.

The question below refers to the following situation: Below are two distributions of final scores for separate statistics courses. The first is from the Fall term, the second is from the Spring term. The standard deviation for the Fall is __________.

The standard deviation is a more precise measure of variation than the range.

The higher the standard deviation, the greater the variation.

A synonym for variability is:

A normal (symmetrical) distribution has no variability.

Given the following distribution of quiz scores for a statistics course: 87, 91, 74, 73, 80, 84, 68, 75 What is the variance?

The question below refers to the following situation: Below are two distributions of final scores for separate statistics courses. The first is from the Fall term, the second is from the Spring term. The standard deviation for the Spring is __________.

The standard deviation measures the degree of variability in a distribution.

Given the following distribution of quiz scores for a statistics course: 87, 91, 74, 73, 80, 84, 68, 75 What is the standard deviation?

The difference between the highest and the lowest values in a distribution of scores is known As the:

The question below refers to the following situation: Below are two distributions of final scores for separate statistics courses. The first is from the Fall term, the second is from the Spring term. The mean for the Spring is __________.