Identify which of the following statements are true.
I. Skewness measures how peaked a set of data is.
II. Skewness is a measure of asymmetry of the distribution of the data about its mean.
III. For a symmetrically distributed data, the mean equals the median but not necessarily the mode.
IV. The value of a measure of skewness can be positive, zero or negative.
Answer : B
An insurance company sells policies where, for each policy, the policyholder pays the first
50 of the cost of any claim. A claim reported to the insurance company takes some unknown value x.
Identify which of the mathematical expressions below represents the cost in to the insurance company of the claim.
Answer : D
When differentiating the product of two factors, u and v, the Product Rule can be used.
State the Product Rule.
A)
Answer : D
Define the standard deviation of a finite data set.
Answer : D