(I the Research Director of a Large Oil Company Conducted

question 211

Multiple Choice

(i. The research director of a large oil company conducted a study of the buying habits of
Consumers with respect to the amount of gasoline purchased at full-service pumps. The arithmetic
Mean amount is 11.5 gallons and the median amount is 11.95 litres. The standard deviation of the
Sample is 4.5 litres. The Pearson's coefficient of skewness can be calculated to be -0.30.
(ii. The Pearson's coefficient of skewness (Sk) measures the amount of skewness and may range
From -3.0 to +3.0. It is computed by subtracting the median from the mean, multiplying the result by
3 and dividing by the variance.
(iii) A study has been made of the number of hours a light bulb will operate before it burns out. If the
Variance of this distribution were computed, it would be measured in hours squared

• A) (i), (ii) and (iii) are all correct statements
• B) (i) and (ii) are correct statements but not (iii).
• C) (i) and (iii) are correct statements but not (ii).
• D) (ii) and (iii) are correct statements, but not (i).
• E) (i), (ii) and (iii) are all false statements.

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