Which test is used to test of significance of the difference between two means
A. t-test
B. F-test
C. z-test
D. $${\chi ^2}$$-test
Answer: Option C
A. t-test
B. F-test
C. z-test
D. $${\chi ^2}$$-test
Answer: Option C
A. Field trails
B. Exhibitions
C. Competition
D. Fair
The intelligency, ability or efficiency can be measured by use of
A. Median
B. G.M.
C. Weighted H.M.
D. Geometric mean
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