Question

A waitress wants to know if people are more likely to tip big when she smiles....

A waitress wants to know if people are more likely to tip big when she smiles. She decides to smile for some customers and not smile for others. She then counts her tips!

Null hypothesis

Alternative hypothesis

IVs

DVs

Best test to use

Results Write-Up

Social-Sciences   Psychology   
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Homework Answers

Answer #1

Null hypothesis: Smiling has no significant impact on receving tips.

Alternative hypothesis: Smiling leads to an increase in receiving tips.

IVs: Smiling.

DVs: Receiving tips.

Best test to use: T-test (repeated measures). This is because a single subject will be exposed to different conditions of the experiment (smiling condition and non-smiling condition) and the differences in the tips will be compared.

Results Write-Up: Results indicate a significant increase in tipping when the waitress was smiling (M = 3.45, SD = 1.11) compared to when she was not (M = 3.00, SD = .80), t(15) = 4.00, p = .001. [Dummy data, just for illustration]

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