The average income tax refund for the 2019 tax year was $3,333.
Assume the refund per person follows the normal probability
distribution with a standard deviation of $943. Complete part a)
through c) below.
a) What is the probability that a randomly selected tax return
refund will be more than $2,345?
b) What is the probability that a randomly selected tax return
refund will be between $1,300 and $2,500?
c) What refund amount represents the 40th percentile of tax
returns?...