• According to the internal revenue service, the mean tax refund for the year 2013 was 3,000. assume the standard deviation is 450 and that the amounts refunded follow a normal probability distribution a) what percent of the refunds are more than $3,100?
•  b) what percent of the refunds are more than $3,100 but less than $3,500? 
• c) what percent of the refunds are more than $2,250 but less than 3,500?

Answer rating: 100% (QA)

a PX 3100 PZ 041 b 310... View the full answer