STATS - TEST 4.pdf

# STATS - TEST 4.pdf - MULTIPLE CHOICE Choose the one...

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Unformatted text preview: MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. If z is a standard normal variable, find the probability. 1) The probability that 2 lies between -0.55 and 0.55 1) A) 0.4176 B) —0.9000 C) 0.9000 D) -0.4176 2) The probability that z is greater than -1.82 2) A) 0.9656 B) -0.0344 C) 0.0344 D) 0.4656 Find the indicated probability. 3) The volumes of soda in quart soda bottles are normally distributed with a mean of 32.3 oz and a 3) standard deviation of 1.2 oz. What is the probability that the volume of soda in a randomly selected bottle will be less than 32 oz? A) 0.5987 B) 0.4013 C) 0.0987 D) 0.3821 Solve the problem. 4) The systolic blood pressures of the patients at a hospital are normally distributed with a mean of 4) 140 mm Hg and a standard deviation of 13.1 mm Hg. Find the two blood pressures having these properties: the mean is midway between them and 90% of all blood pressures are between them. A) 123.2 mm Hg, 156.8 mm Hg B) 128.2 mm Hg, 151.8 mm Hg C) 118.5 mm Hg, 161.5 mm Hg D) 119.5 mm Hg, 162.5 mm Hg 5) The annual precipitation amounts in a certain mountain range are normally distributed with a 5) mean of 107 inches, and a standard deviation of 12 inches. What is the probability that the mean annual precipitation during 36 randomly picked years will be less than 109.8 inches? A) 0.9192 B) 0.5808 C) 0.0808 D) 0.4192 6) Assume that women's heights are normally distributed with a mean of 63.6 inches and a standard 6) deviation of 2.5 inches. If 90 women are randomly selected, find the probability that they have a mean height between 62.9 inches and 64.0 inches. A) 0.7248 B) 0.9318 C) 0.0424 D) 0.1739 Estimate the indicated probability by using the normal distribution as an approximation to the binomial distribution. 7) Two percent of hair dryers produced in a certain plant are defective. 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