Solve the problem:
16. A population consists of the five numbers 2,3,6 10 and 12. Consider sample size of 2 that can be drawn from this population. How many possible samples can be drawn?
17. If a student is ranked eight out of ten in a competition, what is the students percentile rank?
18.We are interested in knowing how likely it is for one type of tree to grow a certain length.The length of these trees exhibit a normal distribution.The tree that you measure is 120 cm.Given the following information,do you think this tree length is uncommon for his type of tree?
Mean=100
Standard Deviation=10
pa help po please​