Problem 1: The SD of the list is zero. Select all that apply:

a)All the numbers in the list must be zero

b)at least half the numbers in the list must be zero

c)all the numbers in the list must be equal

d)at least half the numbers in the list must be equal

e)the mean of the list must be zero

f)the IQR of the list must be zero

g)the range of the list must be zero

h)all the above

i)none of the above