Question

Answer #1

The following information is provided,

Significance Level, α = 0.05, Margin or Error, E = 3, σ = 3

The critical value for significance level, α = 0.05 is 1.96.

The following formula is used to compute the minimum sample size
required to estimate the population mean μ within the required
margin of error:

n >= (zc *σ/E)^2

n = (1.96 * 3/3)^2

n = 3.84

Therefore, the sample size needed to satisfy the condition n
>= 3.84 and it must be an integer number, we conclude that the
minimum required sample size is n = 4

Ans : Sample size, n = 4

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