1. If boxplot for one set of data is much wider than boxplot for second set of data, then
A) the mean of the first set of data should be larger than the mean of second set of data.
B) the median of the first set of data must be larger than median of second set of data.
C) the second set of data should contain several outliers.
D) none of the above require to be true.
2. What type of probability employs sample spaces to find out the numerical probability that an event will occur?
A) classical probability C) empirical probability
B) conditional probability D) subjective probability
3. The staff at the small company comprises: 4 secretaries, 20 technicians, 4 engineers, 2 executives, and 50 factory workers. If the person is selected at random, find out the probability that he or she is the factory worker?
A) 1/4 B) 1/8 C) 5/8 D) 2/5