If the distribution of weekly study times reported by college students has a mean of 25 hours?

... with a standard deviation of 10 hours, this implies that a) A small minority study either less than 5 hours or more than 45 hours. b) A maj

... with a standard deviation of 10 hours, this implies that
a) A small minority study either less than 5 hours or more than 45 hours.
b) A majority study between 15 and 35 hours.
c) Individuals deviate, on the average, approximately 10 hours from the mean of 25 hours.
d) All of the above

or:... with a standard deviation of 10 hours, this implies that a) A small minority study either less than 5 hours or more than 45 hours. b) A majority study between 15 and 35 hours. c) Individuals deviate, on the average, approximately 10 hours from the mean of 25 hours. d) All of the above

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