STATT3REW-SP2010

STATT3REW-SP2010 - Math 1342 Test # 3 (Review ) 1) P(Z <...

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Math 1342 Test # 3 (Review ) Name___________________________________ 1) P(Z < - 0.75 or Z > 1.37) A) 0.6881 B) 0.1413 C) 0.3119 D) 0.8587 E) 0.3059 Assume that X has a normal distribution, and find the indicated probability. 2) The mean is μ = 71.0 and the standard deviation σ = 11.0. Find the probability that X is less than 62.0. A) 0.2061 B) 0.7061 C) 0.7939 D) 0.2939 E) 0.2119 3) The mean is μ = 21.0 and the standard deviation is σ = 2.2 Find the probability that X is greater than 19.7. A) 0.2776 B) 0.7776 C) 0.7224 D) 0.2743 E) 0.2257 Solve the problem. 4) Scores on a test are normally distributed with a mean of 73.5 and a standard deviation of 8.0. Find the score corresponding to bottom 4%. A) 72.7 B) 87.5 C) 62.2 D) 52.3 E) 59.5 Find the indicated probability. 5) The mean monthly income of trainees at a local mill is $1100 with a standard deviation of $150. Find the probability that a trainee earns more than $1040 a month. A) 0.6554 B) 0.8446 C) 0.1554 D) 0.3446 E) 0.6892 Solve the problem. 6) Replacement times for washing machines are normally distributed with a mean of 9.3 years and
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STATT3REW-SP2010 - Math 1342 Test # 3 (Review ) 1) P(Z &lt;...

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