Question

Asked Feb 23, 2019

Step 1

We are given that the 2012 tax returns showed an average refund of $2824 with a standard deviation of $2622. Also, we need to assume that 2012 tax return amounts are normally distributed.

Step 2

Question 7: Find the probability a randomly selected 2012 tax return showed an amount no less than $2621 and at most $6213

**Answer: **We can use the below excel function to find the probability a randomly selected 2012 tax return showed an amount no less than $2621 and at most $6213.

**=NORM.DIST(6213,2824,2622,TRUE)-NORMDIST(2621,2824,2622,TRUE)=0.4328**

Step 3

Question 8: Find the probability a randomly selected 2012 tax return showed an amount greater than $3066

**Answer: **We can use the below excel function to find the probabilit...

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