The t-value for testing 
is calculated using which of the following equations?
Definitions:
Food and Drug Administration
A federal agency of the United States Department of Health and Human Services responsible for protecting and promoting public health through the control and supervision of food safety, tobacco products, dietary supplements, prescription and over-the-counter medications, vaccines, biopharmaceuticals, blood transfusions, medical devices, electromagnetic radiation emitting devices, cosmetics, animal foods & feed, and veterinary products.
Abbreviation
A condensed version of a word or phrase, created to make writing and speaking more straightforward.
NPO
An instruction meaning "nil per os" or nothing by mouth, used to restrict oral intake of food and liquids, typically before surgery or certain medical tests.
Expiration Date
The date after which a product like food, medicine, or cosmetics is not recommended to be used.
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