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Chapter 10: Sampling Distributions and the Central Limit Theorem
Table 10-13:
Central Limit Theorem for the Difference
between Two Sample Means
Since the sampling distribution of the differences of the two sample means
will be approximately normally distributed with a mean
̅
̅
=
-
and standard deviation
̅
̅
=
√
, we can compute
z
- scores for
observed
̅
̅
values.
The equation that is used to compute the associated
z
-scores is