Please explain

Book Selina Tulum i... 51 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 2 3 4 5 Frequency 5 8 12 10 9 tor Round all your answers to 4 decimal places where possible. 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 1 siblings? 26% of all respondents have fewer than how many siblings? Hint: Using a Frequency Table Video on Using the T184 for Statistics Given a Frequency Table ? [+]