We wish to construct a 90% confidence interval on the mean of a population known to be normally distributed based on a sample of
20 observations having a sample mean of 8 and a sample standard deviation of 2.
What is the margin of error for this confidence interval?
1 answer:
Answer:
Margin of error = 0.773
Step-by-step explanation:
We are given the following information in the question.
Sample size, n = 20
Sample mean = 8
Sample standard deviation = 2
90% Confidence interval
Putting the values, we get,
Margin of error:
Putting the values, we get,
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