what are the more appropriate measures of center and spread for this data set? select two choices: one for the center and one for the spread

Use the graph of the sine function y=2sinθ shown below

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Aclassroom is made up of 11 boys and 14 girls. the teacher has four main classroom responsibilities that she wants to hand out to four different students (one for each of the four students). if the teacher chooses 4 of the students at random, then what is the probability that the four students chosen to complete the responsibilities will be all boys?