831. What is the harmonic mean of two numbers x and y
A. 2xy/x+y
B. xy/x+y
C. x+y/xy
D. 2/x + y

832. Coding method is used for calculation of the
A. weighted mean
B. Median
C. mean
D. mode

833. Two number 5 and 4 are Am and GM of numbers respectively then find HM of numbers.
A. 25/16
B. 2/5
C. 16/5
D. 2/5

834. Mode of the series 2, 2, 2, 2, 3, 3, 4, 4, 3, 2, 2, 3, 4
A. 2
B. 3
C. 4
D. none of these

835. It is impossible to calculate ________________ if any value in series is zero.
A. Geometric mean
B. Harmonic mean
C. Arithmetic mean
D. mode

836. Mode of 2, 3, 4 is
A. 2
B. 3
C. 4
D. none of these

837. The collection of data, items or individuals under statistical study is called ______________
A. parameter
B. Sample
C. Population
D. Statistics

838. When the sum of all the observations are dividing by their number, we obtain ____________
A. Arithmetic mean
B. geometric mean
C. Harmonic mean
D. Mode

839. Statistics is a body of methods dealing with _____________
A. The collection of data
B. The analysis and interpreting of data
C. The description of data
D. All of the Above

840. A positively skewed distribution is _______
A. Mean > Mode
B. Mode > Mean
C. Median > Mean
D. None of these

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