#### Question

The following data set includes information from survey research in a psychology course regarding how many hours each individual in the class spent preparing for the exam.

$\begin{matrix} \text{Student} & \text{Amount of hours reported studying}\\ \text{1} & \text{2}\\ \text{2} & \text{3}\\ \text{3} & \text{6}\\ \text{4} & \text{8}\\ \text{5} & \text{9}\\ \text{6} & \text{9}\\ \text{7} & \text{21}\\ \end{matrix}$

Examine the data and respond to the following: What is the middle score in this distribution? What term is used to describe the middle score? What would be the most useful statistic for measuring the variation of the hours spent studying? Why is this statistic a better measure of variation than the range?

#### Solutions

Verified#### Step 1

1 of 4Median is the middle number in sorted grouped or ungrouped data.

#### Step 1

1 of 3- The middle score in this distribution is 8 hours of reported studying. The term median is used to describe the middle score (the score in the middle of distribution; the half of the scores are higher than it and the other half is lower than it). The scores in this example are already ordered from lowest to highest and the score in the middle is 8.