A production manager is interested in the difference int he proportion defective being produced on two machines that are making the same product. T assess this difference he takes a random sample of 1-00 items from machine one and has them inspected to determine the number of defects. 15 defects were found. 100 items in machine 2 revealed 25 defects. With a 95% confidence interval, find the difference in the proportion of defects between these two machines that will be produced if the operating conditions remain the same. Choose the best answer

i) (-.31, .11) ii)(-.15, -.05) iii) (-.25, .05) iv) none of these