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Windy Weather II: The Correlation Between Barometric Pressure and Wind Velocity
The purpose of this science project was to find the correlation between barometric pressure and wind velocity. I did this by recording the wind velocity in rotations per minute by using an anemometer. I used barometer readings, which I got off an Internet site. The readings measured air pressure in inches. I did this procedure daily starting on October 27, 2003 and ending December 1, 2003. I took the readings at 6:30 am, 11:30 am, 6:00 pm, and 9:30 pm. I converted the wind velocity from rotations per minute to miles per hour using an algebraic formula. I graphed my data on a scatter plot to find the correlation between barometric pressure and wind velocity. I used a scatter plot because it shows the correlation between two variables.
I found out that I had a negative correlation between barometric pressure and wind velocity. I knew this because the x-axis (barometric pressure) increased as the y-axis (wind velocity) decreased. I calculated the correlation and found that it was -0.45, not a perfect negative correlation of -1. This showed that there was a relationship between barometric pressure and wind velocity. The data proved that my hypothesis was correct. I hypothesized that as the barometric pressure increased the wind velocity would decrease which my plot showed.
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