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Chapter 9: Q T9.9 (page 616)

Bags of a certain brand of tortilla chips claim to have a net weight of 14ounces. Net weights vary slightly from bag to bag and are Normally distributed with mean 渭 . A representative of a consumer advocacy group wishes to see if there is convincing evidence that the mean net weight is less than advertised and so intends to test the hypotheses

H0:渭=14Ha:渭<14

A Type I error in this situation would mean concluding that the bags

a. are being underfilled when they aren鈥檛.

b. are being underfilled when they are.

c. are not being underfilled when they are.

d. are not being underfilled when they aren鈥檛.

e. are being overfilled when they are underfilled

Short Answer

Expert verified

opton a) are being underfilled when they aren鈥檛.

Step by step solution

01

Step 1:Given information

H0:渭=14

H1:渭<14

02

Step 2:Explaination

Type I error: Reject the null hypothesisH0, once the null hypothesis H0 is true.

A type I error then associate with concluding that the bags are under filled, when type actually are not under filled

Therefore, the correct option is (a)

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Stating hypotheses

a. A change is made that should improve student satisfaction with the parking situation at a local high school. Before the change, 37%of students approve of the parking that's provided. The null hypothesis H0:p>0.37H0:p>0.37is tested against the alternative Ha: p=0.37Ha:p=0.37

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Ha: x-<3000grams Ha:x炉<3000grams

explain what's wrong with the stated hypotheses. Then give correct hypotheses.
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