Bags of a certain brand of tortilla chips claim to have a net weight of 140 grams. Net weights actually vary slightly from bag to bag and are Normally distributed with mean μ. A representative of a consumer advocate group wishes to see if there is any evidence that the mean net weight is less than advertised and so intends to test the hypotheses

H0: μ = 140, Ha: μ

Question

Bags of a certain brand of tortilla chips claim to have a net weight of 140 grams. Net weights actually vary slightly from bag to bag and are Normally distributed with mean μ. A representative of a consumer advocate group wishes to see if there is any evidence that the mean net weight is less than advertised and so intends to test the hypotheses 
 
 H0: μ = 140, Ha: μ < 140. 
 
 To do this, a sample of 16 bags of this brand is selected at random and determines the sample mean weight to be 138.8 grams and the sample standard deviation to be 2.4 grams. 
 Based on these data,

Answer

we would reject H0 at significance level 0.05 but not at 0.025.

Answer

we would reject H0 at significance level 0.01.

Answer

we would reject H0 at significance level 0.025 but not at 0.01.

Answer

we would reject H0 at significance level 0.10 but not at 0.05.

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Bags of a certain brand of tortilla chips claim to have a net weight of 140 gra...

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