Question: Using the large sample confidence interval formula for the mean, compute a 90% lower bound confidence interval for the mean when (a) ???? = 133,

Using the large sample confidence interval formula for the mean, compute a 90%

lower bound confidence interval for the mean when

(a) ???? = 133, ????̄ = 28.5, and ???? = 6.7.

(b) ???? = 250, ????̄ = 212.3, and ???? = 21.6.

(c) ???? = 500, ????̄ = 98.9, and ???? = 2.7.

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