# Homework help needed on sampling distribution

**Question description**

Suppose a waitress keeps track of her tips, as a percentage of the bill, for a random sample of tables.**a. **Identify the observational units in this study.**b. **Identify the variable in this study and Classify its type as categorical or quantitative.

Suppose that, unknown to the waitress, her population mean tip percentage is , with a standard deviation of .**c. **Describe the sampling distribution of her sample mean tip percentage.

Round your answer for the standard deviation to three decimal places.

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