Multiple Choice
A laboratory technician records the life span (in months) of rats treated at birth with a fertility hormone. From the frequency distribution below, find the mean life span. Please round your answer to the nearest tenth. 
A) mean life span = 11.4 months
B) mean life span = 10.3 months
C) mean life span = 10.2 months
D) mean life span = 9.7 months
E) mean life span = 8.5 months
Correct Answer:
Verified
Correct Answer:
Verified
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