Bags of a Certain Brand of Tortilla Chips Claim to Have

question 29

Multiple Choice

Bags of a certain brand of tortilla chips claim to have a net weight of 14 ounces.Net weights actually vary slightly from bag to bag.Assume net weights are Normally distributed.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:  = 14 versus H_a:  < 14.To do this,he selects 16 bags of tortilla chips of this brand at random and determines the net weight of each.He finds a sample mean of 13.88 ounces with a standard deviation of s = 0.24 ounces.What is the value of the test statistic?

• A)t = -0.50
• B)t = -2.00
• C)t = -8.00
• D)t = -8.33

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Definitions:

Diaphragm

A dome-shaped muscular partition separating the thorax from the abdomen in mammals, playing a major role in breathing by contracting and expanding the lungs.

Epiglottis

The flap-like structure that closes off the larynx during swallowing.

Larynx

The part of the respiratory tract between the pharynx and the trachea that is responsible for voice production; also called the voice box.

Palate

The roof of the mouth.