STATISTICAL TECHNIQUES AND TOOLS
CONFIDENCE INTERVALS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Given the Critical Value of Z = 2.11, find the Confidence Level.
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96.52%
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95%
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99%
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98.26%
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Explanation:
Detailed explanation-1: -For a 95% confidence interval Zcritical = 1.96.
Detailed explanation-2: -Step 1: Determine the confidence level, denoted C, where C is a number (decimal) between 0 and 100. Step 2: Obtain the confidence level, denoted by evaluating =1−C100 = 1 − C 100 . Step 3: Use the z-table (or a calculator) to obtain the z-score z/2 z / 2 .
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