Question

janine is analyzing spending habits of students in her high school. she finds a mean monthly discretionary expense of $70 spent on having meals out with friends. the standard deviation of a distribution is 5. what is the variance?

Explanation:

Step1: Recall variance - standard deviation relationship

The variance $\sigma^{2}$ is the square of the standard deviation $\sigma$.

Step2: Calculate the variance

Given $\sigma = 5$, then $\sigma^{2}=5^{2}=25$.

Answer:

25