Solve for mean, mode, cumulative frequency, variance, standard deviation

Here are the calculations for the mean, mode, cumulative frequency, variance, and standard deviation for the given dataset.

First, let's list all the data points and sort them to facilitate calculations. There are $n=64$ data points.

Sorted data:
60, 62, 63, 63, 64, 64, 64, 64, 65, 65, 66, 66, 66, 66, 66, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67