consider the following data set, { -1, 0,2,1,-2}, and these statements regarding this data set:

(i) the sample mean is equal to the sample median

(ii) the sample standard deviation is less than 1.7

(iii) the range is 4

which of these statements is true?

(a) they are all true

(b) only (i) and (ii) are true

(c) only (ii) and (iii) are true

(d) only (i) is true

(e) only (iii) is true