in a random sample of 520 adults, the mean was 150 and the standard deviation was 4.5. the study was…

in a random sample of 520 adults, the mean was 150 and the standard deviation was 4.5. the study was reported with a 95% confidence level, and the confidence interval for the study was 150 ± 0.39. what range of values shows the confidence interval for the study? 146.1 to 153.9 149.61 to 150.39 150 to 150.39 150 to 153.9 done

in a random sample of 520 adults, the mean was 150 and the standard deviation was 4.5. the study was reported with a 95% confidence level, and the confidence interval for the study was 150 ± 0.39. what range of values shows the confidence interval for the study? 146.1 to 153.9 149.61 to 150.39 150 to 150.39 150 to 153.9 done

Answer

Answer:

B. 149.61 to 150.39

Explanation:

Step1: Calculate lower bound

$150 - 0.39=149.61$

Step2: Calculate upper bound

$150 + 0.39 = 150.39$