The Jamestown Steel Company Manufactures and Assembles desks and other office equipment at several plants in western New York state.The weekly production of the Model A325 desk at Plant A is normally distributed with a mean of 200 units.Recently, due to market expansion, new production methods have been introduced and new employees hired.The Vice-president of manufacturing would like to investigate whether there has been a change in the weekly production of the Model A325 desk.A sample of 40 weeks worth of production is taken and a sample mean of 210 desks is found with a standard deviation of 9.

c.Find the critical value using the .05 significance level. (5 points)

1.6849

1.645

1.96

2.0227