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WorksheetsBUSINESS TOOLS
Total questions: 20
Worksheet time: 10mins
What is the formula for arithmetic mean in individual series?
Σ d/N
A+ Σ fd/N
A+ Σ d/N ×i
All of these
1/ Σ X is the formula of
Arithmetic mean
Harmonic mean
Median
None of these
Antilog and log appears in the formulas of
Combined mean
Harmonic mean
Geometric mean
Mode
In which series of Mode has formula?
Individual
Discrete
Continuous
None of these
Range is obtained by
L-S
L+S
L×S
L/S
Q1-Q3/4 is the incorrect formula of Q.D . What is the correct formula?
Q1-Q3/2
Q1-Q3/Q1+Q3
Q3-Q1/2
None of these
To find _______ we use ×100 in formula
Standard Deviation
Quartile Deviation
Co-efficient of variance
Correlation
Median is the
Average of all the observations
Greatest frequency
Midddlemost value
Difference between largest and smallest value
Standard Deviation in discrete series =
√ Σ x^2/N – ( Σ x/N)^2
√ Σ f(x)^2/N – ( Σ fx/N)^2
√ Σ fx/N – Σ f(x)^2/N
None of these
1 – 6 Σ d^2/N(N^2-1) is the formula of
Bowley’s s skewness
Karl pearson’s co-efficient of correlation
Spearmen’s Rank correlation
Con-current deviation
Methods of skewness are
4
3
1
2
Formulas in Karl pearson’s co-efficient of correlation are
3
1
2
4
We use 2 yearly moving total in
Odd
Even
Number of + values are calculated in the formula of
Karl Pearson’s skewness
Con- current Deviation
Spearman’s Rank correlation
Bowley’s Skewness
Find the missing value:
r = N.( Σ X Y)-( Σ X)( Σ Y)/√N.( Σ X^2)-( Σ X)^2√N.__________
( Σ Y)-( Σ Y^2)
( Σ XY)-( Σ XY^2)
( Σ Y^2)-( Σ Y)^2
None of these
Mean is the average of all observations.
True
False
m(m^2-1/12) is included in the formula of simple rank correlation.
True
False
Mode has no formula in individual and discrete series.
True
False
We multiply the years of average by 2 in odd period moving average.
True
False
MD about Mode = Σ f|X-Z|/Mode
True
False
