The Comparison Distribution for a T Test for Independent Means

question 38

Multiple Choice

The comparison distribution for a t test for independent means is a t distribution instead of a normal curve because

• A)tables are not available for the normal curve.
• B)the population variance is estimated.
• C)Z distributions were not used at the time the t test for independent means was invented.
• D)there are more degrees of freedom for two samples than for one.

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