49 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: #ofSiblings 0 1 2 3 4 5 6 Frequency 4 Y 9 B 8 5 B Round all your answers to 4 decimal places where possible. The mean is: [:] What percent of the respondents have at least 1 siblings? :li