In a survey research methods class demonstration, an instructor had a large barrel of 100,000 identical balls and on each ball was written a number between 0 and 100. She asked each student (there were 25 students in the class) to randomly select 50 balls from the barrel and calculate the mean value of the numbers on their 50 balls. She did not tell the class the shape of the distribution of the numbers on the balls but did tell them that the standard deviation was 10. The mean was actually 60 but she did not tell the students. Each student was then asked to use the methods described in Topic 3 of the lecture notes to obtain (for their sample of 50) the 95% confidence interval for the mean. How many of the students would you expect to obtain a 95% confidence interval that included the value 60? 5 25 12 24