Q. The values of the variate that divide a set of data into four equal parts after arranging the observations in ascending order of magnitude are called: Quartiles Deciles Percentiles Difficult to tell Answer: Quartiles

Q. We must arrange the data before calculating: Mean Median Mode Geometric mean Answer: Median

Q. Extreme scores will have the following effect on the median of an examination: They may have no effect on it They may tend to raise it They may tend to lower it None of the above Answer: They may have no effect on it

Q. The first step in calculating the median of a discrete variable is to determine the: Cumulative frequencies Relative weights Relative frequencies Array Answer: Array

Q. The midpoint of the values after they have been ordered from the smallest to the largest or the largest to the smallest is called: Mean Median Lower quartile Upper quartile Answer: Median

Q. The arithmetic mean of 10 items is 4 and the arithmetic mean of 5 items is 10. The combined arithmetic mean is: 4 5 6 90 Answer: 6

Q. The mean for a set of data obtained by assigning each data value a weight that reflects its relative importance within the set, is called: Geometric mean Harmonic mean Weighted mean Combined mean Answer: Weighted mean

Q. When all the values in a series occur the equal number of times, then it is not possible to calculate the: Arithmetic mean Geometric mean Harmonic mean Weighted mean Answer: Weighted mean

Q. When the values in a series are not of equal importance, we calculate the: Arithmetic mean Geometric mean Weighted mean Mode Answer: Weighted mean

Q. Step deviation method or coding method is used for computation of the: Arithmetic mean Geometric mean Weighted mean Harmonic mean Answer: Arithmetic mean