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ECON 338/ENVR 305 CLICKER QUESTIONS Statistics – Question Set #4 (from Chapter6) As the sample size of a random sample increases, the mean of the sample mean _____. 1. 2. 3. 4. 5. Response Counter remains the same increases decreases becomes less accurate cannot be determined from the above information 0% 1. 0% 2. 0% 0% 3. 4. 0% 5. The mean and the standard deviation of a normally distributed population is 30.5 and 3.5, respectively. Find the standard deviation of the sample mean for a sample size of 10. 1. 2. 3. 4. 5. 3.5 0.35 35 3.05 1.11 0% Response Counter 1. 0% 2. 0% 0% 3. 4. 0% 5. A school district is assumed to have 8,000 5th graders. The average weight of a 5th grader is 75 pounds, with a standard deviation of 20 pounds. If a random sample of 50 students is drawn, find the probability that the average weight of a student from the drawn sample will be less than 70 pounds. 1. 2. 3. 4. 5. 1.07 0.00 1.00 0.038 0.962 0% Response Counter 1. 0% 2. 0% 0% 3. 4. 0% 5.