Question: An aging pitcher has recorded the following pitch distribution over his long career from 1995 to 2014. 1. Fast ball..................... 52% 2. Curve ball.................. 19%

An aging pitcher has recorded the following pitch distribution over his long career from 1995 to 2014.

1. Fast ball..................... 52%
2. Curve ball.................. 19%
3. Slider......................... 15%
4. Change up................. 14%

However, undergoing a surgery to repair a tendon in 2015 the pitches for the first 5 games in 2016 were recorded using the codes. Is there evidence to conclude that his pitching distribution has changed?

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