Using the principle of the confidence interval, the range which shows the confidence interval of the study is (149.61, 150.39).
Given
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.
The lower bound of the confidence interval is the observed score minus the margin of error; the upper bound is the observed score plus the margin of error.
The width of the confidence interval is twice the margin of error.
Therefore,
The range of values shows the confidence interval for the study is;
Lower bound = = 150 - 0.39 = 149.61
Upper boundary = 150 + 0.39 = 150.39
Hence, the confidence interval for the study would be (149.61; 150.39).
To know more about Confidence interval click the link given below.
https://brainly.com/question/2396419
