Eco 272 Fall 2019 03 Indicate the answer choice that best completes the statement or answers the question 1. A standard normal distribution is a normal distribution a. with a mean of 1 and a standard deviation of o. b. with a mean of O and a standard deviation of I. with any mean and a standard deviation of I. d. with any mean and any standard deviation 2. The weight of football players is normally distributed with a mean of 200 pounds and a standard deviation of pounds. What percent of players weigh between 180 and 220 pounds? 28.81% b. 0.5762% c, 0.281% 57.62% 3. A continuous random variable may assume all values in an interval or collection of intervals. b. only integer values in an interval or collection of intervals. c. only fractional values in an interval or collection of intervals. d. all the positive integer values in an interval. 4. The following data was collected from a simple random sample of a population. 13 15 14 16 12 The point estimate of the population mean a. cannot be determined, since the population size is unknown . is 14 c. is 4 d. is 5 5. The standard deviation of a point estimator is called the a. standard deviation. 6.standard error. c. point estimator. d. variance of estimation. 6. A sample of 24 observations is taken from a population that has 150 elements. The sampling distribution of is a. approximately normal because xis always approximately normally distributed. b. approximately normal because the sample size is large in comparison to the population size. c. approximately normal because of the central limit theorem. a normal if the population is normally distributed. 7. A sample of 400 observations will be taken from an infinite population. The population proportion equals 0.8. The probability that the sample proportion will be greater than 0.83 is a. 0.4332 Page 1