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The boxplots below represent critics' movie ratings (from 0 to 100) for movies that have been rated by the Motion Picture Association of America as R, PG-13, PG, and G. List the movie ratings according to their median critics' rating, from worst to best.
Statistically Significant
Statistically significant results indicate that the observed effects or differences in a study are unlikely to be due to chance, based on a predetermined significance level.
Alpha Level
Another term for significance level, representing the threshold of probability at which the null hypothesis is rejected in hypothesis testing.
Null Hypothesis
A hypothesis that there is no significant difference between specified populations, any observed difference being due to sampling or experimental error.
Alternative Hypothesis
A statement in statistics that indicates the presence of an effect, difference, or relationship when compared to the null hypothesis.
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