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k- Kaelin Thomas- Google Chrome Secure l https://www.mathd.com/Student/PlayerHomework.aspx? rkId=442660 uestionld ed-false&cld; 4643 terwina ST 3123 Fall 2017 sec 01 Homework: Chapter 7 Score: 0 of 1 pt 7.3.73 HW Score: 85.71%, 6 of 7 Question Help shes tariff rates for railroad-car shipments of ethanol. Assuming that the standard deviation of such tariff rates is $1050, determine the probability that the mean tariff rate of 500 randomly selected railroad-car shipments of ethanol will be within $90 of the mean tarif rate of all railroad-car shipments of ethanol. Interpret your answer in terms of sampling error The probability is 0.97 (Round to three decimal places as needed) 2 Enter your answer in the answer box and then click Check Answer Clear All remaining

Explanation / Answer

Margin of error = 90

Or, Z * SD/Sqrt (n) = 90

Or, Z * 1050/sqrt(500) = 90

Or, Z = 1.92

P(Z < 1.92) = 0.9726

  

  

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