multiple choice questions from 1 to 15

1. A specific characteristic of a population is known as a A sample B. parameter C. statistie D. descriptive statistic 2. An observed set of the population that has been selected for analysis is called A. a sample B. a process Ca forecast D. descriptive statistics 3. Calculate the median value of the following eight numbers: 14, 34, 50, 10, 24, 11. 32. 20 A 22 B. 20 C. 24 D. 244 4. The least squares method minimizes which of the following? A. Sum of the absolute deviations from the line B. Sum of the squared deviations from the line C. The variance in the observed values D. All of the above S. In a perfectly symmetrical distribution A. the mean equals the median B. the median equals the mode C. the mean equals the mode D. All the above 6. When extreme values are present in a set of disa, which of the following descriptive summary measures are most appropriate A. Coefficient of variation and range B. Mean and standard deviation C. Median and interquartile range D. Mode and variance 7. Which of the following is not a property of the arithmetic mean? A. It is based on every observation in the sample. B. It is always equal to the population mean C. Its variance is no larger than the variance of the population distribution. D. Its variance becomes smaller when the sample size gets bigger 8. If a sample of -100 is taken from a population whose standard deviation is equal to 100, then the standard error of the mean quals A. 10 B 100 C 1.000 D. 10,000 9. According to the central limit thoorem, the sampling distribution of the mean can be approximated by the normal distribution A. as the number of samples gets large enough B. as the sample size (number of observations) gets "large enough." C. as the size of the population standard deviation increases D. as the size of the sample standard deviation decreases 10. A right-skewed continuous distribution used to determine the sampling distribution of the sample variance is the A normal distribution B. chi-square distribution C. binomial distribution. D. uniform distribution 11. Estimators are evaluated on all of the following properties EXCEPT A. unbiasedness B. consistency C.effectiveness D. efficiency 12. Which of the following is not a property of the student's 1 distribution? A. It is symmetric B. It's exact shape i.e. spread) is characterized by the degrees of freedom C. As the sample size grows, it gradually approaches the normal distribution D. All of the above are properties of the distribution 13. A student claims that he can correctly identify whether a person is a business major or an agriculture major by the way the person dresses. Presented with one person and asked to identify the major of this person who is either a business or agriculture major), he considers this to be a hypothesis test with the full hypothesis being that the person is a business major and the alternative that the person is an agriculture major. What would be a Type Il error? A Saying that the person is an agriculture major when in fact the person is a business major 8. Saying that the person is a business major when in fact the person is a business major C. Saying that the person is a business major when in fact the person is an agriculture major D. Saying that the person is an agriculture major when in fact the person is an agriculture major 14. The random variable which is used in the hypothesis test for correlation. follows the A Student's distribution B. normal distribution C. chi-square distribution D. F distribution 13. The least squares method minimizes which of the following? A. SSR B SSE CSST D. All of the above