Artery disease. An article in the New England Journal of Medicine describes a randomized controlled trial that compared the effects of using a balloon with a special coating in angioplasty (the repair of blood vessels) compared with a standard balloon. According to the article, the study was designed to have power 90%, with a two-sided Type I error of 0.05, to detect a clinically important difference of approximately 17 percentage points in the presence of certain lesions 12 months after surgery.13 What fixed significance level was used in calculating the power? Explain to someone who knows no statistics why power 90% means that the experiment would probably have been significant if there was a difference between the use of the balloon with a special coating compared to the use of the standard balloon.

Laws corporation is considering the purchase of a machine costing $16,000. estimated cash savings from using the new machine are $4,120 per year. the machine will have no salvage value at the end of its useful life of six years and the required rate of return for laws corporation is 12%. the machine's internal rate of return is closest to (ignore income taxes) (a) 12% (b) 14% (c) 16% (d) 18%

Which of the following would be an accurate statement about achieving a balanced budget

Acontractor was awarded a purchase order for commercial items for $1.5 million under the authority of far subpart 13.5. the purchase order was issued in november 2010 and containedall applicable clauses that were current as of the date of the purchase order. under the purchase order, the contractor is required to comply with a small business subcontracting plan that contains all of the required elements. which of the following is true? a. the contractor must submit a standard form 294, subcontracting report for individual contracts. b. the contractor must submit an individual subcontracting report through the electronic subcontracting reporting system (esrs). c. the contractor may submit either an sf 294 or report its subcontracting through esrs. d. the contractor is not required to submit any subcontracting reports.