The mean commute time for these 48 cities is 26.91.

b) Median: This is the middle number in a sorted list of numbers.

The median commute time for these 48 cities is 25.95.

c) Mode: This is the number that appears most frequently in the dataset.

The mode for these 48 cities is 23.40.

d) Variance: These measures how spread out the numbers are from the mean.

The variance of commute time for these 48 cities is 20.86. Standard Deviation: This is the square root of the Variance. Also, measures the amount of variation or dispersion of a set of values.

The standard deviation of commute times for these 48 cities is 4.57.

e) Quartile 3 is the middle value between the median and the highest value of the data set. It represents where the 75th percentile of the data is.

Then, Q3 of commute time for these 48 cities is 28.50.