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7. A group of 10...

7. A group of 10 men subjected to a stress situation, the mean number of heartbeats per minute was 126, and the standard deviation was 4. Find the 95 % confidence interval of the true mean.

A) 123 129 ; B) 121 127 ; C)120 130 ; D) 117 127

A) 123 129 ; B) 121 127 ; C)120 130 ; D) 117 127

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