statistics

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What SPECIFIC statistical test would be applied to these data collected to answer the following questions?
What’s the average amount of pain Mr. Smith reported yesterday? Is there a significant difference in depression levels (using a scale of 0-60) between pts who take citalopram at 40 mg/d versus those who take citalopram at 80 mg/d?
Are levels of job stress higher among RNs who work in pediatric or adult ICUs?

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