**841. ______________ is a part of population selected for study.****A. Sample**

B. Parameter

C. population

D. Statistic

**842. The formula for obtaining arithmetic mean of first n numbers is**

A. n(n+1)/2

B. n(n-1)/2

C. n/2**D. (n+1)/2**

**843. ______________ is the combination of probability assessment and monetary consequences for making business decision.**

A. Statistical inference**B. Statistical Decision theory**

C. Statistical description

D. None of these

**844. ___________ is the most suitable method for calculating average increase in population.**

A. Mean**B. Median**

C. G.M

D. H.M

**845. A descriptive measure of a sample is called ________________****A. statistics**

B. Parameter

C. Variable

D. Sample

**846. if deviation is taken from ______________ the sum of deviation of** **observation is zero.**

A. Geometric Mean**B. Mode**

C. Median

D. Arithmetic mean

**847. For representation of the distribution as a whole by calculation of central value is called measure of _________**

A. Kurtosis**B. Skewness**

C. Central tendency

D. Dispersion

**848. We compute ______________, if the values in a series are not of equal importance.**

A. weighted mean

B. Harmonic mean**C. Mean**

D. Median

**849. Measurement of a chance that an uncertain event will occur is:**

A. A trail

B. An Experiment

**C. A probability**

D. An Event

**850. Ifp(A)=0, then P(B/A is ________****A. undefined**

B. 1

C. Zero

D. None of these