The mean income per household in a certain state is $29,500 with a standard deviation of $5,750. The middle 95% of incomes is between what two values? The income are normally distributed
A: $23.750 and $35,250 B:$18,000 and $41,000 C:$29,500 and 41,000 D:$12,250 and $46,750 E:$12,325 and $81,550

Question

The mean income per household in a certain state is $29,500 with a standard deviation of $5,750. The middle 95% of incomes is between what two values? The income are normally distributed
A: $23.750 and $35,250  B:$18,000 and $41,000  C:$29,500 and 41,000  D:$12,250 and $46,750  E:$12,325 and $81,550

anonymous · Answer

that would be 2 standard deviations form the mean. You have to add and subtract the standard deviations from the mean to get the limits.