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.

StudentAmount of hours reported studying122336485969721\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?

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

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