Figuer:
CUSTOMER (Primary Key = CID)
CNAME Is NOT NULL

question 1

Multiple Choice

Figuer:
CUSTOMER (primary key = CID)
CNAME is NOT NULL $$\begin{array} { | l | l | l | l | l | } \hline \text { CID } & \text { CNAME } & \text { AGE } & \text { RESID\_CITY } & \text { Cregion } \\\hline 10 & \text { BLACK } & 40 & \text { SD } & \text { SD } \\\hline 20 & \text { GREEN } & 25 & \text { SD } & \text { SD } \\\hline 30 & \text { JONES } & 30 & \text { La Mesa } & \text { SD } \\\hline 40 & \text { MARTIN } & 35 & \text { LA } & \text { LA } \\\hline 50 & \text { SIMON } & 22 & \text { Pomona } & \text { LA } \\\hline 60 & \text { VERNON } & 60 & \text { Poway } & \text { SD } \\\hline\end{array}$$ RENTALS (primary key = RTN)
CID is a foreign key referencing CUSTOMER
CID is NOT NULL
MAKE is NOT NULL
MAKE is a foreign key referencing RENTCOST $$\begin{array} { | l | l | l | l | l | l | } \hline \text { CID } & \text { MAKE } & \text { DATE\_OUT } & \text { PICKUP } & \text { RETURN } & \text { RTN } \\\hline 10 & \text { FORD } & 10 - \text { Oct-00 } & \text { SD } & \text { SD } & 1 \\\hline 10 & \text { GM } & 01 - \text {-Jan-01 } & \text { SD } & \text { LA } & 2 \\\hline 10 & \text { FORD } & 01 - \text { Feb-01 } & \text { LA } & \text { SD } & 3 \\\hline 20 & \text { NISSAN } & 07 - J u l - 00 & \text { SD } & & 4 \\\hline 30 & \text { FORD } & 01 - J u l - 00 & \text { SD } & \text { SD } & 5 \\\hline 30 & \text { GM } & 01 - \text {-Dec-00 } & \text { SD } & \text { SD } & 6 \\\hline 40 & \text { FORD } & 01 - \text { Aug-00 } & \text { LA } & \text { LA } & 7 \\\hline 50 & \text { GM } & 01 - \text { Sep-00 } & \text { LA } & \text { SD } & 8 \\\hline 60 & \text { NISSAN } & 02 \text {-Jan-01 } & \text { SD } & \text { LA } & 9 \\\hline\end{array}$$ RENTCOST
MAKE is the primary key $$\begin{array} { | l | l | } \hline \text { MAKE } & \text { COST } \\\hline \text { FORD } & 30 \\\hline \text { GM } & 40 \\\hline \text { NISSAN } & 30 \\\hline \text { TOYOTA } & 20 \\\hline \text { VOLVO } & 50 \\\hline\end{array}$$ (Access) View1:
SELECT RTN, MAKE, PICKUP, RENTALS.CID,
CUSTOMER.CID, CNAME, AGE, Cregion
FROM CUSTOMER INNER JOIN RENTALS
ON CUSTOMER.CID = RENTALS.CID
(Access) View2:
SELECT RTN, MAKE, PICKUP, RENTALS.CID,
CNAME, AGE, Cregion
FROM CUSTOMER INNER JOIN RENTALS
ON CUSTOMER.CID = RENTALS.CID
(Access) View3:
SELECT RTN, RENTALS.MAKE, PICKUP, RENTALS.CID,
CNAME, AGE, Cregion, COST
FROM (CUSTOMER INNER JOIN RENTALS
ON CUSTOMER.CID = RENTALS.CID.
INNER JOIN RENTCOST
ON RENTALS.MAKE = RENTCOST.MAKE
-(Access) UPDATE View1 SET MAKE = 'NISSAN',Cregion = 'LA'
WHERE CNAME = 'BLACK'
Which of the following is not true?

• A) This command updates 3 rows in RENTALS
• B) This command updates 1 row in CUSTOMER
• C) After execution of this command, SELECT MAKE FROM View1 will show 5 rows where MAKE has 'NISSAN' for value
• D) The CUSTOMER table is not updated

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Definitions:

Output

The final product, result, or amount produced by a process, system, or activity.

Multicollinearity

A statistical phenomenon where two or more independent variables in a regression model are highly correlated, potentially affecting the reliability of the model’s coefficients.

T-Tests

Statistical tests used to compare the means of two groups or the mean of one group against a known mean.

F-Test

A statistical test used to compare the variances of two populations to see if they are significantly different.