Question: 5.23 Statistical significance. Exercise 5.19 describes a randomized comparative experiment to determine the effect of the pitch of a voice in a radio advertisement for

5.23 Statistical significance. Exercise 5.19 describes a randomized comparative experiment to determine the effect of the pitch of a voice in a radio advertisement for a new sandwich on the perceived size of the sandwich. The researchers concluded that there was a statistically significant effect of pitch on perceived size, with those who heard the lower pitched voice perceiving the sandwich to be larger than those who heard the higher pitched voice. Explain what “statistically significant” means in the context of this experiment, as if you were speaking to a person who knows no statistics.

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