Q. If the two observations are a = 2 and b = -2, then their geometric mean will be: Zero Infinity Impossible Negative Answer: Impossible

Q. Geometric mean is suitable when the values are given as: Proportions Ratios Percentage rates All of the above Answer: All of the above

Q. Taking the relevant root of the product of all non-zero and positive values are called: Arithmetic mean Geometric mean Harmonic mean Combined mean Answer: Geometric mean

Q. If a set of data has one mode and its value is less than mean, then the distribution is called: Positively skewed Negatively skewed Symmetrical Normal Answer: Positively skewed

Q. The sum of the deviations taken from mean is: Always equal to zero Some times equal to zero Never equal to zero Less than zero Answer: Less than zero

Q. A curve that tails off to the right end is called: Positively skewed Negatively skewed Symmetrical Both (b) and (c) Answer: Positively skewed

Q. If the values of mean, median and mode coincide in a unimodel distribution, then the distribution will be: Skewed to the left Skewed to the right Multimodal Symmetrical Answer: Symmetrical

Q. For moderately skewed distribution, the value of mode is calculated as: 2Mean 3Median 3Median 2Mean 2Mean + Mode 3Median – Mode Answer: 3Median 2Mean

Q. A distribution with two modes is called: Unimodel Bimodal Multimodal Normal Answer: Bimodal

Q. Extreme scores on an examination have the following effect on the mode: They tend to raise it they tend to lower it They have no effect on it difficult to tell Answer: They have no effect on it