Suppose researchers have reported that the population mean for theannual salary of certified welders was $40,000, and the populationstandard deviation was $5200. A new survey of 200 welders wastaken, and the mean annual salary of this sample was $39,000. Atthe 0.05 significance level, can we conclude that the mean annualsalary of certified welders is less than $40,000? Complete steps 1through 6 below.
