The monthly incomes for 12 randomly selected people, each with a bachelor's degree in economics, are 4450.44 shown on the right. Complete parts (a) through (c) below. 4596.87 4366.82 4455.82 4151.47 3727.51 4283.19 4527.38 4407.63 Assume the population is normally distributed. 3946.48 4023.06 4221.24 (a) Find the sample mean. x= 4263.2 (Round to one decimal place as needed.) (b) Find the sample standard deviation. s= 260.2 (Round to one decimal place as needed.) (c) Construct a 95% confidence interval for the population mean u. A 95% confidence interval for the population mean is ( ). (Round to one decimal place as needed.)
The monthly incomes for 12 randomly selected people, each with a bachelor's degree in economics, are 4450.44 shown on the right. Complete parts (a) through (c) below. 4596.87 4366.82 4455.82 4151.47 3727.51 4283.19 4527.38 4407.63 Assume the population is normally distributed. 3946.48 4023.06 4221.24 (a) Find the sample mean. x= 4263.2 (Round to one decimal place as needed.) (b) Find the sample standard deviation. s= 260.2 (Round to one decimal place as needed.) (c) Construct a 95% confidence interval for the population mean u. A 95% confidence interval for the population mean is ( ). (Round to one decimal place as needed.)
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter12: Probability
Section12.3: Conditional Probability; Independent Events; Bayes' Theorem
Problem 54E: Cigarette Smokers The following table gives a recent estimate in millions of the smoking status...
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The monthly incomes for 12 randomly selected people, each with a bachelor's degree in economics, are 4450.44
shown on the right. Complete parts (a) through (c) below.
4596.87
4366.82
4455.82
4151.47
3727.51
4283.19
4527.38
4407.63
Assume the population is normally distributed.
3946.48
4023.06
4221.24
(a) Find the sample mean.
x= 4263.2 (Round to one decimal place as needed.)
(b) Find the sample standard deviation.
s= 260.2 (Round to one decimal place as needed.)
(c) Construct a 95% confidence interval for the population mean u.
A 95% confidence interval for the population mean is ( D
(Round to one decimal place as needed.)
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