To estimate a population mean, the sample size needed to provide a margin of error of 3 or less with a 95% confidence when the population standard deviation equals 11 is
(Round your answer to the nearest integer.)

The minimum sample needed to provide a margin of error of 3 or less is 52.

Step-by-step explanation:

The confidence interval for population mean (μ) is:

The margin of error is:

Given:

MOE = 3

σ = 11

The critical value for 95% confidence interval is:

**Use the z-table for critical values.

Compute the sample size (n) as follows:

Thus, the minimum sample needed to provide a margin of error of 3 or less is 52.

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step-by-step explanation:

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