Problem

Express the confidence interval 191.6±63.1 in interval form.

Answer

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Answer

So, the confidence interval in interval form is (128.5,254.7)

Steps

Step 1 ：Subtract 63.1 from 191.6 to get the lower limit of the interval: 191.6−63.1=128.5

Step 2 ：Add 63.1 to 191.6 to get the upper limit of the interval: 191.6+63.1=254.7

Step 3 ：So, the confidence interval in interval form is (128.5,254.7)

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