The accounting department analyzes the variance of the weekly unit costs reported by two production departments. a sample of 16 cost reports for each of the two departments shows cost variances of 2.1 and 5.5, respectively. is this sample sufficient to conclude that the two production departments differ in terms of unit cost variance? use = .10.

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then

(b) suppose that consolidated power decides to use a level of significance of α = .05, and suppose a random sample of 100 temperature readings is obtained. if the sample mean of the 100 temperature readings is x⎯⎯ = 60.990, test h0 versus ha and determine whether the power plant should be shut down and the cooling system repaired. perform the hypothesis test by using a critical value and a p-value. assume σ = 5. (round your z to 2 decimal places and p-value to 4 decimal places.)

What is the perimeter of a rectangle if the length is 5 and the width is x?