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###### Heart rates were measured in 2 groups of individuals. One group included individuals that had recently...

Heart rates were measured in 2 groups of individuals. One group included individuals that had recently had heart attacks. The other group included normal individuals. A t-test was performed. The calculated t = 7.04. The critical t at 7 degrees of freedom was: 2.36. What is the conclusion? significant difference unknown until another t test is calculated no significant difference O unknown until a standard deviation is calculated

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