Question

# 1) The standard t test for independent means should NOT be used if the populations are...

1) The standard t test for independent means should NOT be used if the populations are highly __________ in opposite directions.

2) For a study using a t test for independent means, with any given total number of participants, power is greatest when the participants are divided into __________ groups.

3)

In the formula “= S2M1 + S2M2,” “S2M1” represents

the variance of the difference scores for Population 1.

the estimated standard deviation of Population 1.

the estimated mean of the distribution of variances of Population 1.

the variance of the distribution of means for Population 1, based on an estimate of the population variance.

It is not feasible to apply t test if data are skewed

1) The standard t test for independent means should NOT be used if the populations are highly skewed in opposite directions.

Power is maximum when the groups are equal size

2) For a study using a t test for independent means, with any given total number of participants, power is greatest when the participants are divided into two equal groups.

S2M1 is The sum of mean square of estimate

In the formula “= S2M1+ S2M2,” “S2M1” represents

the variance of the distribution of means for Population 1, based on an estimate of the population variance.

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