A 90% confidence interval for a population mean is given as (17.68, 22.02). This confidence interval is based on a simple random
sample of 36 observations. Calculate the sample mean and standard deviation. Use the t-distribution in any calculations.
1 answer:
Answer:
The correct solution is "7.704". The further explanation is given below.
Step-by-step explanation:
According to the question,
Sample mean,
The Margin of error (E),
=
=
=
Now,
⇒
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