If a 5th grader go to a restaurant and eats 3,4,6,3,and 4 what's the mean number of times a 5th grader goes to a restaurant? explain the mean describe for this question

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?