A dietitian wondered if being on a diet was related to sodium intake. She knew that the mean daily sodium intake in the United States was 3,400 mg with a standard deviation of 270. She obtained a random sample of 172 dieting Americans and found, for sodium consumption, M = 2,900 mg.

2. Pick a test that's appropriate for this study.

3. Using = .05, calculate the test statistic.

4. State your conclusion about this study.