NECO Past Questions and Answers - Page 188

936.

The variance of a given set of numbers is defined as the

A.

Absolute value of the standard deviation

B.

Square of the standard deviation

C.

Square root of the standard deviation

D.

Square root of the standard deviation

E.

Square root of the mean deviation

Correct answer is B

No explanation has been provided for this answer.

937.

The equation PxVyTz = Constant is Charles’ law if

A.

x = 0, y = 1 and z = -1

B.

x = 0, y = -1 and z = 1

C.

x = 1, y = 1 and z = 0

D.

x = 1, y = 1 and z = -1

E.

x = 1, y = 1 and z = 1

Correct answer is A

No explanation has been provided for this answer.

939.

The most suitable instrument for measuring the diameter of a thin wire is a

A.

meter rule

B.

micrometer screw gauge

C.

pair of dividers

D.

pair of engineer’s calipers

E.

venire calipers

Correct answer is B

No explanation has been provided for this answer.

940.

When the total product starts falling, then the marginal product is

A.

Constant

B.

Increasing

C.

Maximum

D.

Negative

E.

Zero

Correct answer is D

No explanation has been provided for this answer.