Show Instructions 15 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 must be less than 15 since...

Q15,16 Please provide justified answer for each one please

Extracted text: Show Instructions 15 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 must be less than 15 since the range is equal to 15 None of the suggested answers are correct C should not be used since it is against logic to compute squared deviation from a negative mean must be about zero to adjust for negative and positive temperature values is negative since all the numbers are negative 16 The point estimate of the is the positive square root of the sample variance. sample standard deviation B None of the suggested answers are correct sample mean population standard deviation