QNT 561 Final Exam 2

QNT 561 Final Exam 2 1. A difference between calculating sample mean and population mean is A. Only in symbols, we use instead of µ and n instead of N B. We divide sum of observations by n - 1 instead of n C. observations are ranked and select middle value for population mean D. There are no differences 2. Which of following measures of central location is affected most by extreme values? A. Median B. Mean C. Mode D. Geometric mean 3. Which level of measurement is required for median? A. Nominal B. Ordinal C. Interval D. Ratio 4. In which of following distributions is probability of a success usually small? A. Binomial B. Poisson C. Hyper geometric D. All distribution 5. Which of following is not a requirement of a probability distribution? A. Equally likely probability of a success B. Sum of possible outcomes is 1.00 C. outcomes are mutually exclusive D. probability of each outcome is between 0 and 1 6. Which of following is not a requirement of a binomial distribution? A. A constant probability of success B. Only two possible outcomes C. A fixed number of trails D. Equally likely outcomes 7. A sample A. Is a part of population B. Has more than 30 observations C. Is usually identified as N D. All of above 8. difference between sample mean and population mean is called A. Population mean. B. Population standard deviation