Question: Determine the sample size required for a simple random sample to attain the prespecified bound on the error of estimation for estimating a mean in

Determine the sample size required for a simple random sample to attain the prespecified bound on the error of estimation for estimating a mean in each of the following scenarios where the number of units in the target population is unknown.

(a) ???? ≈ 30 and ???? = 7.5.

(b) ???? ≈ 2, and ???? = 0.35.

(c) ???? ≈ 100, and ???? = 6.

(d) ???? ≈ 80, and ???? = 1.5.

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