Suppose that the raw daily oxygen purities delivered by an air-products supplier have a standard deviation σ ≈ .1 (percent), and it is plausible to think of daily purites as independent random variables. approximate the probability that the sample mean x of n = 25 delivered purities falls within .03 (percent) of the raw daily purity mean, μ .

Maker-bot corporation has 10,000 shares of 10%, $90 par value, cumulative preferred stock outstanding since its inception. no dividends were declared in the first two years. if the company pays $400,000 of dividends in the third year, how much will common stockholders receive?

Penny poodle wanted to know which dog obedience training program was more effective: puppy pride, the approach she has been using for any years, or doggie do-right, a new approach. penny convinced 50 human companions of untrained dogs to participate in her study. the dogs and their humans were randomly assigned to complete the puppy pride or doggie do-right course. at the end of the training programs, all of the dogs were scored on their level of obedience on a standardized dog obedience checklist (scores could range from 10 to 100). the design of this study is:

Complete electronics inc. sells a point-of-sale computer with a two-year service contract. complete collects $ 2 comma 500 cash for the selling price of the computer and $ 576 for the two-year service contract. how is revenue recognized?