Suppose You Plan to Build a 98% Confidence Interval Estimate

question 42

Multiple Choice

Suppose you plan to build a 98% confidence interval estimate of a population mean, using a sample of size 121.You will be estimating the population standard deviation with the sample standard deviation.The appropriate t-value for your interval would be ____ which you could approximate with a z score of _______ from the normal table.

• A)2.358, 2.33
• B)1.289, 2.33
• C)1.658, 1.96
• D)1.980, 1.96
• E)2.617, 2.33

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