Question: The Dean from UCLA concerned that students grade point average have changed.The graduating seniors mean GPA over last five years 2.75 . The Dean randomly

The Dean from UCLA concerned that students grade point average have changed.The graduating seniors mean GPA over last five years 2.75 . The Dean randomly samples 256 senior and find mean GPA 2.85 with sample standard deviation of 0.65. what would be null and alternate hypothesis and what be the standard error

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