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OpenStudy (anonymous):
The means and standard deviation of some subgroups of the sample are as shown in the following table: Subgroup Mean Std. Dev N Vegetarian 72.9 11.7 40 Non-vegetarians 73.5 11.4 43 Males 74.9 12.0 38 Females 71.8 11.0 45 Is there a significant difference in the mean diastolic blood pressures, at =.05, between a. vegetarians and non-vegetarians? b. males and females?
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