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BritishGent BritishGent
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7 years ago
The comparison distribution for a t test for independent means is a t distribution instead of a normal curve because
A) there are more degrees of freedom for two samples than for one.
B) the population variance is estimated.
C) Z distributions were not used at the time the t test for independent means was invented.
D) tables are not available for the normal curve.
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Using the textbooks:

Statistics for Psychology, 5th Edition (Aron)
Measurement and Evaluation in Psychology and Education, 8th Edition (Thorndike)
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ErhardtErhardt
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7 years ago
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BritishGent Author
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7 years ago
Smart ... Thanks!
Morgan-C
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Yesterday
Good timing, thanks!
jbarnett14
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2 hours ago
I appreciate what you did here, answered it right Smiling Face with Open Mouth
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