Asked Nov 23, 2019

A 95% confidence interval for the mean was computed with a sample of size 90 to be (16,22). Then the Error is ±3.

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True The 95% confidence interval for the mean is computed by using the formula: C.I TtE Here, the lower confidence interval value is 16, use that to find the sample mean value. 16 -3 16+3 19 And by using the sample mean value and the error, find the upper confidence interval value UCL T3 =19 3 =22 Thus, the error value +3 is correct


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