Help! Simplify (see photo) pls explain If you don’t know pls don’t answer thanks
1 answer:
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Answer:
z-interval: (-1.64, 1.64)
90% Confidence interval: (7954,8446)
Step-by-step explanation:
We are given the following in the question:
Sample mean, = $8,200
Sample size, n = 225
Alpha, α = 0.10
Sample standard deviation, s = $750
90% Confidence interval:
Putting the values, we get,
z-interval: (-1.64, 1.64)
(7954,8446) is the required confidence interval.