Professor Mandrake, a psychologist, studies the number of days a student feels depressed during 30 days. He takes a sample and obtains the following date 1, 2.2, 4, 4, 4.5, 5, 5, 5, 5, 6, 6. 6,8,8, 10, What is
true about the distribution of his data?
a) It is normally distributed, because there is more than one mode.
b) It is not normally distributed, because it is bimodal.
c) It is not normally distributed, because it is not symmetric.
d) It is normally distributed, because it is approximately symmetric