Real Midterm with answers

Real Midterm with answers - PART A TRUE/FALSE(1 mark each 1...

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The End PART A - TRUE/FALSE (1 mark each) 1. The Standardized Normal random variable has a mean of 1.0. A) True B) False 2. In Minitab, the Worksheet Window keeps a record of everything that you do. A) True B) False 3. The term "marginal probabilities" refers to probabilities that can not be accurately determined A) True B) False 4. If a Bernoulli process with =0.6 produces a success on the first trial, the probability of a success on the second trial is less than 0.6. A) True B) False 5. Mutually exclusive events cannot be statistically independent. A) True B) False 6. If P(A)=0.1, P(B)=0.2 and P(A B)=0.02, then A and B are statistically independent events. A) True B) False 7. A continuous variable may take on any value within its relevant range even though the measurement device may not be precise enough to record it. A) True B) False 8. Six sigma programs aim to have processes that operate at a 99.7% error-free level. A) True B) False
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The End 9. A population is a subset of measurements taken from a large group. A) True B) False 10. Labeling responses "true" or "false" creates nominal scaled data. A) True B) False 11. The standard deviation is defined as the positive square root of the variance. A) True B) False 12. In a sample size of 40, the sample mean is 15. In this case, the sum of all the observations in the sample is i x =600. A) True B) False 13. When A and B are mutually exclusive, P(A B) can be found by adding P(A) and P(B). A) True B) False 14. The uniform distribution has higher probabilities for small values of X than for larger values of X. A) True B) False 15. Flipping a coin is an example of a Bernoulli process. A) True B) False 16. The probability that there will be no heads in ten flips of a fair coin is 10 0.5 . A) True B) False
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The End 17. In a binomial distribution, for any value of , an increase in n will not change the mean. A) True B) False 18. The number on the face of a die is an example of a continuous random variable. A) True B) False 19. Marital status is an example of an ordinal scaled variable. A) True B) False 20. If a numerical random variable is considered to take on values with a "true" zero point, the level of measurement is the ordinal scale.
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This note was uploaded on 12/21/2010 for the course STATS 2QA3 taught by Professor Buchanan during the Spring '10 term at McMaster University.

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Real Midterm with answers - PART A TRUE/FALSE(1 mark each 1...

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