SOLUTION: Suppose that a pharmacy wants to estimate the standard deviation of the daily demand for a certain drug. It is known that the daily demand for this drug follows an approximately no

Question 625051: Suppose that a pharmacy wants to estimate the standard deviation of the daily demand for a certain drug. It is known that the daily demand for this drug follows an approximately normal distribution. A random sample of 26 days has a sample mean of 125 orders for this drug with a standard deviation of 10 orders. Find a 90% confidence interval for the population standard deviation of the daily demand for this antibiotic.
What is the lower limit of the 90% confidence interval?
What is the upper limit of the 90% confidence interval?
I'm pretty lost with statistics and am looking for a tutor I can understand, but any help would be appreciated. Thank you in advance!
Answer by oscargut(2103) (Show Source): You can put this solution on YOUR website!
Hi, the details are a bit long but i put the answer here
Lower = 122.47
Upper: 127.53
The results are rounded to 2 dp
If you have any doubt or if you have more problems my e-mail is:
mthman@gmail.com
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