A student in PSYC 227 class collects data for a class project. She asks 10 classmates to shoot 10 free throws on a standard basketball court and records the number of shots made by each participant (X). She also has these same participants run an obstacle course and records their time (Y). She wants to statistically evaluate if variables X and Y are related. She computes the sum of squared deviations for X, the sum of squared deviations for Y, and the sum of cross products between X and Y. SUM Should you reject or fail to reject the null hypothesis? O Reject O Fail to reject (X-X)² 3.24 7.84 1.44 10.24 0.04 0.64 3.24 1.44 0.04 0.64 28.8 (Y-Y)² 15.21 0.81 16.81 4.41 9.61 8.41 15.21 0.01 4.41 3.61 78.5 (X-X) (Y-Y) -7.02 -2.52 -4.92 -6.72 -0.62 -2.32 -7.02 -0.12 -0.42 -1.52 -33.2
A student in PSYC 227 class collects data for a class project. She asks 10 classmates to shoot 10 free throws on a standard basketball court and records the number of shots made by each participant (X). She also has these same participants run an obstacle course and records their time (Y). She wants to statistically evaluate if variables X and Y are related. She computes the sum of squared deviations for X, the sum of squared deviations for Y, and the sum of cross products between X and Y. SUM Should you reject or fail to reject the null hypothesis? O Reject O Fail to reject (X-X)² 3.24 7.84 1.44 10.24 0.04 0.64 3.24 1.44 0.04 0.64 28.8 (Y-Y)² 15.21 0.81 16.81 4.41 9.61 8.41 15.21 0.01 4.41 3.61 78.5 (X-X) (Y-Y) -7.02 -2.52 -4.92 -6.72 -0.62 -2.32 -7.02 -0.12 -0.42 -1.52 -33.2
A First Course in Probability (10th Edition)
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
Transcribed Image Text:### Analysis of Data Collected from a Psychology Class Project
A student in a PSYC 227 class collected data for a class project to explore the relationship between two variables: the number of free throws made by classmates on a basketball court (X) and their times completing an obstacle course (Y). The data collection involved 10 participants. The student calculated several statistics to evaluate the relationship between these variables, including the sum of squared deviations for X, the sum of squared deviations for Y, and the sum of cross products between X and Y.
#### Data Summary Table
The table below presents the calculated values:
| \((X - \bar{X})^2\) | \((Y - \bar{Y})^2\) | \((X - \bar{X})(Y - \bar{Y})\) |
|--------------------|---------------------|-------------------------------|
| 3.24 | 15.21 | -7.02 |
| 7.84 | 0.81 | -2.52 |
| 1.44 | 16.81 | -4.92 |
| 10.24 | 4.41 | -6.72 |
| 0.04 | 9.61 | -0.62 |
| 0.64 | 8.41 | -2.32 |
| 3.24 | 15.21 | -7.02 |
| 1.44 | 0.01 | -0.12 |
| 0.04 | 4.41 | -0.42 |
| 0.64 | 3.61 | -1.52 |
SUM:
- \((X - \bar{X})^2\) = 28.8
- \((Y - \bar{Y})^2\) = 78.5
- \((X - \bar{X})(Y - \bar{Y})\) = -33.2
#### Interpretation of Results
- **\((X - \bar{X})^2\)**: This column represents the sum of squared deviations for variable X (number of free throws made).
- **\((Y - \bar{Y})^2\)**: This column represents the sum of
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