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 .

Which of the following accurately describes one way that individual goods differ from public goods? a. people can be excluded from using individual goods if they don't pay. b. all individual goods are normal goods. c. demand for individual goods is always inelastic. d. consumer rivalry results in decreasing marginal utility for individual goods.2b2t

Which stroke of the four-stroke cycle is shown in the above figure? a. power b. compression c. exhaust d. intake

Which of these is not a result of regular exercise