Question

During a cold winter, the temperature stayed below zero for ten days (ranging from -20 to -5). The variance of the temperatures of the ten day period A. is negative since all the numbers are negative B. must be at least zero C. can not be computed since all the numbers are negative D. can be either negative or positive

Answer 1

Using the variance concept, it is found that the correct option is:

B. must be at least zero

• The mean of a data-set is the sum of all observations divided by the number of observations.
• The variance of a data-set is the sum of the differences squared between each term and the mean, divided by the number of values.

Since the variance is squared, it's minimum value is 0, and thus, the correct option is:

B. must be at least zero

A similar problem is given at brainly.com/question/14946088