ELEMENTS OF STATISTICS
Q.1
When sample size is small and population S.D. is known the test be used.
Ans.
't' test.
Q.2
To reduce the experimental error with heterogeneous material we need.
Ans.
More replication & use of Local control technique.
Q.3
The father of vital statistics was
Ans.
Captain John Grant.
Q.4
Pie-diagram is named as pi because___
Ans.
The sectors resembles the slices cut from a pie.
Q.5
When the numerical data are presented in a descriptive form then it is called
Ans.
Textual presentation.
Q.6
Commulative frequency is also known as
Ans.
Ogive.
Q.7
The age of an individual can be considered under the category of
Ans.
Continuous variable.
Q.8
The Indian railway budget for the five year data can be well represented by
Ans.
Deviation bar diagram.
Q.9
Is there any effect of change of origin and scale of data on arithmetic mean ?
Ans.
Yes, there is small change in value.
Q.10
What will be harmonic mean of two observations 5 and –5 ?
Ans.
∞.
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