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10 April, 07:06

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

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  1. 10 April, 07:13
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    Given:

    random sample of 520 adults

    mean was 150

    standard deviation was 4.5.

    reported with a 95% confidence level, and the confidence interval for the study was 150 ± 0.39.

    The range of values that shows the confidence interval for the study is 149.61 to 150.39

    150 + 0.39 = 150.39

    150 - 0.39 = 149.61
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