To determine how well a new method of teaching vocabulary is working in a certain elementary school, education researchers plan to give a vocabulary test to a sample of 40 sixth graders. Assume the sample standard deviation is s=8. The researchers plan to compute the sample mean x , then construct a 97% confidence interval for the population mean test score. Interpret the interval.
Let m be the margin of error for a 97% confidence interval. We conclude that the confidence interval x-m<