Find the range, variance, and standard deviation for the given sample data. Include appropriate units (such as "minutes") in your results. The following data represent the duration (in minutes) of workout sessions completed by a group of individuals at a fitness center over a week:
$\text{30, 45, 60, 50, 40, 55, 70, 35, 65, 50, 42}$
What do the results tell us about the variation in workout durations?

• A. ${\text{Range = 30 minutes, Variance = 145.25 minutes}}^2,\text{ Standard deviation = 11.20 minutes}$The workout durations show high variability, meaning that workout times differ significantly from person to person.
• B. ${\text{Range = 40 minutes, Variance = 155.8 minutes}}^2,\text{ Standard deviation = 12.48 minutes}$ The workout durations show moderate variability, meaning they are somewhat spread out but not extremely different.
• C. ${\text{Range = 40 minutes, Variance = 155.8 minutes}}^2,\text{ Standard deviation = 13.25 minutes}$ The workout durations have low variability, indicating that most workout times are close to the average.
• D. ${\text{Range = 30 minutes, Variance = 175.40 minutes}}^2,\text{ Standard deviation = 11.20 minutes}$There is no variation in the workout durations, as all values are nearly the same.

Answer: (B)