Standard Deviation: Videos & Practice Problems

${\text{Range = 10 hours, Variance = 14 hours}}^2,\text{ Standard deviation = 4.31 hours}$

Yes, the range alone is enough to determine the best smartphone model.

${\text{Range = 8 hours, Variance = 10 hours}}^2,\text{ Standard deviation = 4.31 hours}$

Yes, the standard deviation helps identify which smartphone has the longest battery life.

${\text{Range = 8 hours, Variance = 10 hours}}^2,\text{ Standard deviation = 3.16 hours}$

No, the calculated statistics only describe the variation in battery life but do not directly help in selecting a specific smartphone.

${\text{Range = 10 hours, Variance = 14 hours}}^2,\text{ Standard deviation = 3.16 hours}$

No, because statistical measures like variance and standard deviation are not useful for comparing real-world smartphone performance.