Which statement is true concerning the set {1,1,0,15, 2,3, 4,0,1,3} ?
a. The standard deviation is 4.42 and the z-score is 2.17, a mild outlier.
b. The standard deviation is 19.5556 and the z-score is 2.17, a mild outlier.
c. The standard deviation is 4.42 and the z-score is 2.71, a mild outlier.
d. The standard deviation is 4.24 and the z-score is 2.71, a mild outlier.