SOLUTION: Assuming the population has an approximate normal distribution, if a sample size
n=28 has a sample mean x¯=39 with a sample standard deviation s=2, find the margin of error at a
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Question 1206865: Assuming the population has an approximate normal distribution, if a sample size
n=28 has a sample mean x¯=39 with a sample standard deviation s=2, find the margin of error at a 80% confidence level. Round the answer to two decimal places.
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!
Margin of error =
Where:
is -score corresponding to the desired confidence level (for a % confidence level, ≈ )
a sample size
a sample mean x¯= or
a sample standard deviation
Margin of error =
Margin of error =
Margin of error =
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