A certain colege has 490 of the 584 freshman return as sophomores. Does this college have a right to brag that it has an unusually high retention rate?
No, because their retention rate is not more than 3 standard deviations above the expected rate of 74%
Yes, because their retention rate is not more than 3 standard deviations above the expected rate of 74%
No, because their retention rate is over 5 standard deviations above the expected rate of 74%
Yes, because their retention rate is over 5 standard deviations above the expected rate of 74%
Please explain how you got this answer