3. In a study of life expectancy of 400 people in a certain geographic region, the mean age at death was 70 years, and the standard deviation was 5.1 years. If a sample of 50 people from this region...

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Extracted text: 3. In a study of life expectancy of 400 people in a certain geographic region, the mean age at death was 70 years, and the standard deviation was 5.1 years. If a sample of 50 people from this region is selected, what is the probability that the mean life expectancy will be greater than 68 years? STEPS SOLUTION 1. Identify the given information. 2. Identify what is asked for. 3. Identify the formula to be used. 4. Solve the problem. 5. State the final answer. "Stervoerrdshto is the use of God-thnerrs werEcer fow thi aanamIl t