What Will Be Returned When the Following SQL Statement Is

question 75

Multiple Choice

What will be returned when the following SQL statement is executed? SELECT driver_no,count(*) as num_deliveries
FROM deliveries
GROUP BY driver_no;

• A) A listing of all drivers, sorted by driver number
• B) A listing of each driver as well as the number of deliveries that he or she has made
• C) A count of all of the deliveries made by all drivers
• D) An error message

---

Definitions:

Difference Scores

Values obtained by subtracting one set of observations from another, useful in measuring changes or effects in paired data.

α

Represents the level of significance in hypothesis testing, indicating the probability of rejecting a true null hypothesis.

Degrees of Freedom

Degrees of freedom refer to the number of independent values or quantities that can be assigned to a statistical distribution while still satisfying a given number of constraints.

T-test for Dependent Means

A statistical method used to compare the means of two related groups.