Question
A random sample of 23 items is drawn from a population whose standard deviation is unknown. The sample mean is x x = 840 and
A random sample of 23 items is drawn from a population whose standard deviation is unknown. The sample mean is
x
x
= 840 and the sample standard deviation iss= 15. 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 from
to
(b)Construct an interval estimate ofwith 98% confidence, assuming thats= 30.(Round your answers to 3 decimal places.)
The 98% confidence interval is from
to
(c)Construct an interval estimate ofwith 98% confidence, assuming thats= 60.(Round your answers to 3 decimal places.)
The 98% confidence interval is from
to
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Elementary Statisitcs
Authors: Barry Monk
2nd edition
1259345297, 978-0077836351, 77836359, 978-1259295911, 1259295915, 978-1259292484, 1259292487, 978-1259345296
