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The average income tax refund for the 2009 tax year was $2945. Assume the refund per person follows the normal probability distribution with a standard deviation of $955. Complete parts a through d below CEED a. What is the probability that a randomly selected tax return refund will be more than $2400? 0.7157 (Round to four decimal places as needed.) b. What is the probability that a randomly selected tax return refund will be between $1400 and $26007 0.3868 (Round to four decimal places as needed) c. What is the probability that a randomly selected tax return (Round to four decimal places as needed.) eturn refund will be between $3100 and $45007 o

The average income tax refund for the 2009 tax year was $2945. Assume the refund per person follows the normal probability distribution with a standard deviation of $955. Complete parts a through d below CEED a. What is the probability that a randomly selected tax return refund will be more than $2400? 0.7157 (Round to four decimal places as needed.) b. What is the probability that a randomly selected tax return refund will be between $1400 and $26007 0.3868 (Round to four decimal places as needed) c. What is the probability that a randomly selected tax return (Round to four decimal places as needed.) eturn refund will be between $3100 and $45007 o

A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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The average income tax refund for the 2009 tax year was $2945. Assume the refund per person follows the normal probability distribution with a standard deviation of $955. Complete parts a through d below a. What is the probability that a randomly selected tax return refund will be more than $2400? 0.7157 (Round to four decimal places as needed.) b. What is the probability that a randomly selected tax return refund will be between $1400 and $28007 0.3868 (Round to four decimal places as needed.) c. What is the probability that a randomly selected tax return refund will be between $3100 and $45007 (Round to four decimal places as needed.)
Transcribed Image Text:The average income tax refund for the 2009 tax year was $2945. Assume the refund per person follows the normal probability distribution with a standard deviation of $955. Complete parts a through d below a. What is the probability that a randomly selected tax return refund will be more than $2400? 0.7157 (Round to four decimal places as needed.) b. What is the probability that a randomly selected tax return refund will be between $1400 and $28007 0.3868 (Round to four decimal places as needed.) c. What is the probability that a randomly selected tax return refund will be between $3100 and $45007 (Round to four decimal places as needed.)
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