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 2.4 and 5.6, respectively. is this sample sufficient to conclude that the two production departments differ in terms of unit cost variance? use = .10.

What are the coordinates of the hole in the graph of the function f(x) ? f(x)=x2−9x−3 enter your answer in the boxes.

1. there are 25 students who started computer programming in elementary school and 25 students who started computer programming in middle school. the first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%. the line plot shows the differences after 10 rerandomizations. determine whether the difference in the means of the two groups is significant based on the line plot. explain your answer.

14. (05.02 lc) what is the value of y in the solution to the following system of equations? (5 points) 2x + y = −4 5x + 3y = −6