When Is a T-Test Used Instead of a Z-Test

question 17

Multiple Choice

When is a t-test used instead of a z-test?

• A)When the population µ is known
• B)When the population deals with two samples
• C)When the population standard deviation is known
• D)When the population standard deviation is unknown

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Definitions:

Rack Jobber

A company or individual who provides and stocks merchandise in stores, typically in specialty areas, and shares profits with the retailer or pays for shelf space.

Limited-Function Merchant Wholesaler

A wholesaler that offers a narrower range of services than full-service wholesalers, typically specializing in only certain kinds of products or functions.

Merchant Wholesaler

A type of intermediary that buys goods in bulk from manufacturers or producers and sells them in smaller quantities to retailers or other businesses.

Warehouse Club

A membership-based retail store offering a wide variety of merchandise, often in bulk and at lower prices than conventional retailers.