Travelocity Would Like to Test If the Standard Deviation for Roundtrip

question 6

Multiple Choice

Travelocity would like to test if the standard deviation for roundtrip airfares between New York and London is less than $200. A random sample of 22 roundtrip airfares between New York and London had a standard deviation of $142. The degrees of freedom for this hypothesis test would be _______.

• A)20
• B)19
• C)21
• D)18

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Definitions:

Autobiographical Memory

The aspect of memory that involves the recollection of personal experiences and events in one's life.

Lab-Based

pertains to research or experiments conducted in a controlled, indoor setting, typically in a laboratory.

Bias

A tendency to think in a certain way or to follow certain procedures regardless of the facts of the matter.

Mental Representation

The mind's ability to hold a mirror to the world by representing objects, events, or states of affairs internally.