The Canadian Broadcasting Company reported the results of a study involving the loudness of movies and the implications of excessive noise on hearing and health. You want to determine if there is a difference between the loudness of movies in the various movie rating categories. Below are the results of tests done with a random sample of five movies in each of four movie rating categories. The numbers show the peak (maximum) decibel level for each of the movies in the sample.

Use one-way analysis of variance to determine if there is sufficient sample evidence to reject a €œno difference in population mean peak levels€ null hypothesis at the 1% significance level. Show your results in a proper ANOVA table.  

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80 79 86 82 78 PG 84 81 89 76 85 PG-13 80 89 86 79 94 86 85 82 93