The difference of two means in case of small samples is tested by the formula
A. $${\text{t}} = \frac{{{{\overline {\text{X}} }_1} - {{\overline {\text{X}} }_2}}}{{\text{S}}}\sqrt {\frac{{{{\text{n}}_1}{{\text{n}}_2}}}{{{{\text{n}}_1} + {{\text{n}}_2}}}} $$
B. $${\text{t}} = \frac{{{{\overline {\text{X}} }_1} - {{\overline {\text{X}} }_2}}}{{\text{S}}}$$
C. $${\text{t}} = \sqrt {\frac{{{{\text{n}}_1}{{\text{n}}_2}}}{{{{\text{n}}_1} + {{\text{n}}_2}}}} $$
D. $${\text{t}} = \frac{{{{\overline {\text{X}} }_1} - {{\overline {\text{X}} }_2}}}{{\text{S}}}\sqrt {\frac{{{{\text{n}}_1} - {{\text{n}}_2}}}{{{{\text{n}}_1}{{\text{n}}_2}}}} $$
Answer: Option B
This Question Belongs to Agriculture >> Agricultural Statistics
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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