Answer
Parameter for normal distribution is
μ = mean of the sample collected from the population
$σ_{s}$ = standard deviation / square root of n
α = (1-confidence level)100%
$Z_{α}$ = value of confidence level
Parameter for t-distribution is
X̄ = mean of the sample
$σ_{X̄}$ = standard deviation of the sample
α = (1-confidence level)/2
$Z_{α/2}$ = value of the confidence level
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