Question 14) Given that, population variance = 2.2
sample size (n) = 25 and sample mean = 18.5
Since, population variance is known, we used the standard normal distribution.
A 90% confidence level has significance level of 0.10 and critical value is,
The lower limit of the 90% confidence interval for the population mean is,
=> Lower Limit = 18.0120
Question 14 1 pts We draw a random sample of size 25 from a normal population...
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