A researcher makes a research abo the life time of batteries which have a normal distribution of 50 hours and variance of 9 hours. In order to understand the life time of batteries s/he randomly selected 9 batteries and calculate the sample mean as 48 hours and standard deviation of 5 hours. Construct 80 % confidence interval for the true population mean of life time of batteries. (45.43, 50.57) (46.04, 49.96) There is no correct answer (46.72, 49.28) (46.36, 49.65) Boş bırak

MATLAB: An Introduction with Applications
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A researcher makes a research about the life time of batteries which have a normal distribution with mean of 50
hours and variance of 9 hours. In order to understand the life time of batteries s/he randomly selected 9 batteries
and calculate the sample mean as 48 hours and standard deviation of 5 hours. Construct 80 % confidence interval for
the true population mean of life time of batteries.
1-
a) (45.43, 50.57)
b) (46.04, 49.96)
c)O There is no correct answer
d) (46.72, 49.28)
e) (46.36, 49.65)
Boş bırak
Transcribed Image Text:A researcher makes a research about the life time of batteries which have a normal distribution with mean of 50 hours and variance of 9 hours. In order to understand the life time of batteries s/he randomly selected 9 batteries and calculate the sample mean as 48 hours and standard deviation of 5 hours. Construct 80 % confidence interval for the true population mean of life time of batteries. 1- a) (45.43, 50.57) b) (46.04, 49.96) c)O There is no correct answer d) (46.72, 49.28) e) (46.36, 49.65) Boş bırak
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