Saturday, November 19, 2011

How do you find the maximum error???

A local company wants to evaluate their quality of service by surveying their customers. Their budget limits the number of surveys to 100. What is their maximum error of the estimated mean quality for a 95% level of confidence and an estimated standard deviation of 5?


A) 0.9604


B) 0.9800


C) 1.96


D) 5%

How do you find the maximum error???
formule


max error


= z_alpha/2 * sigma / sqrt(n)


= z_2.5% * 5 /sqrt(100)


= 1,96 * 5/10


= 0,98


answer B) is correct


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