K300 EXAM3 REVIEW

# K300 EXAM3 REVIEW - K300 Review CHAPTERS 6 & 7 Last Revised...

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K300 Review CHAPTERS 6 & 7 Last Revised Spring 2009 This review is only a sampling of possible exam questions. All notes, homework, quizzes, etc. should also be reviewed. Using the following uniform density curve, answer the question. 1) What is the probability that the random variable has a value less than 6? 1) Assume that the weight loss for the first month of a diet program varies between 6 pounds and 12 pounds, and is spread evenly over the range of possibilities, so that there is a uniform distribution. Find the probability of the given range of pounds lost. 2) Between 8 pounds and 11 pounds 2) If Z is a standard normal variable, find the probability. 3) P( - 0.73 < Z < 2.27) 3) 4) P(Z > 0.59) 4) 5) The probability that Z is less than 1.13 5) 6) The probability that Z lies between - 2.41 and 0 6) Thermometers are supposed to give readings of 0°C at the freezing point of water. Tests on a large sample of these thermometers reveal that at the freezing point of water, some give readings below 0°C (denoted by negative numbers) and some give readings above 0°C (denoted by positive numbers). Assume that the mean reading is 0°C and the standard deviation of the readings is 1.00°C. Also assume that the frequency distribution of errors closely resembles the normal distribution. A thermometer is randomly selected and tested. 7) A quality control analyst wants to examine thermometers that give readings in the bottom 4%. Find the reading that separates the bottom 4% from the others. 7)

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## This note was uploaded on 01/16/2011 for the course STAT 103 taught by Professor Dinwoodie during the Fall '08 term at Duke.

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K300 EXAM3 REVIEW - K300 Review CHAPTERS 6 & 7 Last Revised...

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