Practice problem

Measures of Central Tendency: Standard Deviation

+1 contributors

Contributors

Victoria Rodriguez
Anusha Rahman

Table of Student - Cups of coffee per day
Student1 - 3
Student2 - 5
Student3 - 2
Student4 - 0
Student5 - 1
Student6 - 2
Student7 - 4
Student8 - 1
Student9 - 1
Student10 - 3 — Image source: by Victoria Rodriguez

The table above represents the number of cups of coffee students drink per day. The $\sigma$ (standard deviation) of the set above is $1.47$ . The mean of the set of data is $2.2$ cups of coffee per day. How many students fall between the mean and $-\sigma$ (one standard deviation below the mean)?