Total number of students = n = 11
Proportion of first graders = p = 20% = 0.2
Mean number of first graders going to camp will be = np
Using the given values, we get:
Mean = 11(0.2) = 2.20
Standard deviation can be calculated as:
[tex]s= \sqrt{np(1-p)} [/tex]
Using the values, we get:
[tex]s= \sqrt{11(0.2)(0.8}=1.33[/tex]
Therefore, the mean will be 2.20 and standard deviation will be 1.33 of the number of first graders going to camp.
