Introducing a new series that features statistics and your favourite teams! What a great way to learn math! Were the Cubs a streaky team in the World Series?Three wins in a row after losing seems like it would be streaky and many believed it was. This investigation will find out if the outcomes of the games show streakiness or their outcomes were independent (unaffected by the previous game). HypothesesWe need to test the two different hypotheses involved in sports statistics before we get going on the testing: null and alternative. Null basically believes that nothing truly *special* happened and alternative thinks that something special did happen. Null: The outcomes of the Cubs games were independent and they had the same ability. Alternative: The Cubs were a streaky team. Two Way TableWe had to organize their wins in a different way since they had an odd number and this method involves grouping two outcomes together. We also subtracted 2 wins out of 3 total when they won first by 2 wins out of 3 total when they lost first. We ended up with 0% which is a telling sign.. Simulation Time!We will conduct a simulation using their percentage of successes following a win or loss (0%) and then see how many dots follow after. Once we get that, we see how many out of 50 trials that is and that is our 'p-value'. If the p-value (a determining factor on how many go above the normal) is small and is below 5%, then the alternative is most likely true! But if it goes above 5%, we have ourselves the null hypothesis. Conclusion40/50 dots are above 0%, which gives us a p-value of 80%. This is very large and we will conclude that it is plausible that the outcomes were independent and the Cubs had the same ability throughout the World Series (null hypothesis!). Also, there is not enough evidence to support the hypothesis that the Cubs were streaky. In conclusion, there's a good chance that they just had it in them to play well like always and not even better than before. Thanks for playing along! Hope you learned something from this!
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AuthorHi, I'm Jenna and I'm a sports fan! I've been avidly watching sports since 2011 because I found that by watching sports, I would be able to communicate with my dad and brother better. Ever since I got into sports, I've been able to enjoy myself more when I go to sporting events with my family. Archives
December 2017
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