Question: Hi everyone here please help me answer this i really cant answer this , I wishing here rightnow that someone can help me here.please guys

Hi everyone here please help me answer this i really cant answer this , I wishing here rightnow that someone can help me here.please guys badly need your help now:(

6. The test scores for a very large statistics class have a bell-shaped distribution with a mean of 70 points. a. If 16% of all students in the class scored above 85, what is the standard deviation of the scores? b. If 95% of the scores are between 60 and 80, what is the standard deviation

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