Zappos Is an Online Retailer Based in Nevada and Employs $$t \bar { x }$$

question 59

Multiple Choice

Zappos is an online retailer based in Nevada and employs 1,300 employees. One of their competitors, Amazon.com, would like to test the hypothesis that the average age of a Zappos employee is less than 36 years old. A random sample of 22 Zappos employees was found to have an average age of 33.9 years. The standard deviation for this sample was 4.1 years. Amazon would like to set ? = 0.025. The test statistic for this hypothesis test would be .

• A)\[t \bar { x }\] = - 2.40
• B)\[t \bar { x }\]= - 1.87
• C)\[z \bar { x }\]= - 1.19
• D)\[z \bar { x }\] = - 2.66

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Definitions:

Milgram Experiment

A psychological experiment conducted by Stanley Milgram in the 1960s to study obedience to authority, where participants were instructed to administer electric shocks to another person.

Stanford University Prison Experiment

A psychological study conducted by Philip Zimbardo in 1971 at Stanford University, where students were assigned roles of prisoners and guards to explore the effects of perceived power.

Generalization

Drawing a conclusion about a certain characteristic of a population based on a sample from it.

Logical Support

The provision of reasons or evidence to justify a claim or argument.