CONCLUSION

The tester’s bat speed went up with the weighted bat swings everyday. The first week the speed increased the most and then the next two weeks it only went up a bit. The first two weeks the range between the speeds was a lot bigger than the last two weeks, which had much smaller ranges.

Sources of Error

·       There was only one tester so it might depend from person to person, girls or boys or age.

·        The position of the speed gun varied.

·        The physical status of the tester depends (if the tester was tired, had sore muscles, etc.).

·        If the time period of three weeks was not long enough to develop muscles.

·        The tester (me) swung the light bat outside of the testing for my normal softball practices. Maybe the speed augmentation was helped by these swings.