3. Here is the data from the 20 students again: {0,
0,1,1,2,2,2,3,3,3,3,3,3, 4, 4, 4, 4, 5, 5, 6).
Find the mean and standard deviation for
number of siblings.
What percent of the data is within one
standard deviation from the mean? Enter your
answer as a percent XX%.