The % of alcohol content is normally distributed for the
mouthwash of brand A, with a standard deviation σ of 5%. We have
measured the alcohol content of 13 mouthwashes of brand A, and the
sample standard deviation is 7%.
What is the 95% lower confidence interval for σ?
[0.050,0.116]
[0.053,inf]
[0.0028,inf]
[0,0.106]
[-inf, 0.106]
[0,0.0113]
The % of alcohol content is normally distributed for the mouthwash of brand A, with a standard deviation σ of 5%. We hav
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The % of alcohol content is normally distributed for the mouthwash of brand A, with a standard deviation σ of 5%. We hav
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