During a cold winter, the temperatures stayed below zero for ten days. The range was -20 to -5. The variance of the temperatures of this period:
A. is negative since all temperatures are negative.
B. must be at least zero
C. can not be computed since all values are negative.
D. can be either negative or positive.
Answer:B
During a cold winter, the temperatures stayed below zero for ten days. The range was -20 to -5. The variance of the temperatures of this period:
A. is negative since all temperatures are negative. B. must be at least zero C. can not be computed since all values are negative. D. can be either negative or positive.