Hot Chocolate Experiment

Have you ever stirred your hot chocolate and noticed that the pitch increases as you continue to tap?  Here are recordings of the tapping sound under different conditions.

Condition #3: Do marshmallows impact the change in pitch?

Here we tested cups with and without marshmallows.

Null Hypothesis:  There is no substantial difference between cups with or without marshmallows.

Here are recordings of what the tapping sounded  like with and without marshmallows:

  1. Regular mug with marshmallows


  • Do you think the data proves that the null hypothesis true or false?  Why or why not?

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