Imagine that Dr. Olson studied weight gain in the first year on the job using a sample of 100 US commercial truck drivers. He found that the 95% confidence interval for the mean weight gained was 15-25 pounds. What can we conclude from this information? O The population of US truck drivers probably gains less than 5 pounds in the first year on the job O The population of US truck drivers gains exactly 15 pounds in the first year on the job O The population of US truck drivers probably gains more than 50 pounds in the first year on the job O The population of US truck drivers probably gains an average of 15 to 25 pounds in the first year on the job A nutritionist believes that her new organic diet program will increase the heights of 5-year-old girls. Assume the population distribution of heights of 5-year-old girls is normally distributed with (mu) = 40 inches and (sigma) = 2 inches. The nutritionist gives a random sample of n = 25 of 5-year-old girls the new diet program. The mean height for this sample is 41 inches. Compute the 95% confidence interval for the population mean for 5-year-old girls if they all received the new diet. Round to the nearest whole number. 40 to 42 36 to 45 31 to 51 41 to 44