According to the Internal Revenue Service, the mean tax refund for the year 2013 was $4,000. Assume
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Question:
- According to the Internal Revenue Service, the mean tax refund for the year 2013 was $4,000. Assume the standard deviation is $550 and that the amounts refunded follow a normal probability distribution.
- A) what percent of the refunds are more than $4,100?
- B)what percent of the refunds are more than $4,100 but less than 4,500?
- c) what percent of the refunds are more than $3,250 but less than $4,500?
Related Book For
Statistical Techniques in Business and Economics
ISBN: 978-0078020520
16th edition
Authors: Douglas Lind, William Marchal
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