Business, 22.02.2021 19:30 aliami0306oyaj0n
When testing for differences of means, the t-statistic t equals StartFraction Upper Y overbar Subscript m Baseline minus Upper Y overbar Subscript w Over SE left parenthesis Upper Y overbar Subscript m Baseline minus Upper Y overbar Subscript w right parenthesis EndFraction
, where SE left parenthesis Upper Y overbar Subscript m Baseline minus Upper Y overbar Subscript w Baseline right parenthesis equals StartRoot StartFraction s Subscript m Superscript 2 Over n Subscript m EndFraction plus StartFraction s Subscript w Superscript 2 Over n Subscript w EndFraction EndRoot
has:
A. a student t distribution if the population distribution of Y is not normal.
B. cannot be computed unless n Subscript m equals n Subscript w.
C. a normal distribution even in small samples.
D. a student t distribution if the population distribution of Y is normal.
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When testing for differences of means, the t-statistic t equals StartFraction Upper Y overbar Subs...
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