Question
A random sample of 21 items is drawn from a population whose standard deviation is unknown. The sample mean isx x= 750 and the sample
A random sample of 21 items is drawn from a population whose standard deviation is unknown. The sample mean isx
x= 750 and the sample standard deviation iss= 10. UseAppendix Dto find the values of Student'st.
(a)Construct an interval estimate ofwith 98% confidence.(Round your answers to 3 decimal places.)
The 98% confidence interval is fromto
(b)Construct an interval estimate ofwith 98% confidence, assuming thats= 20.(Round your answers to 3 decimal places.)
The 98% confidence interval is fromto
(c)Construct an interval estimate ofwith 98% confidence, assuming thats= 40.(Round your answers to 3 decimal places.)
The 98% confidence interval is fromto
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A First Course In Probability
Authors: Sheldon Ross
10th Edition
0134753119, 978-0134753119
