59 randomly selected students were asked how many siblings were in their family. Let X represent the number of pairs of siblings in the student's family. The results are as follows:

# of Siblings 0 1 2 3 4 5

Frequency 11 10 11 5 12 10

The mean is:

The median is:

The sample standard deviation is:

The first quartile is:

The third quartile is:

What percent of the respondents have at least 2 siblings?%

55% of all respondents have fewer than how many siblings?