NETTCP TEST SECTION 2 QUESTIONS WITH
VERIFIED ACCURATE ANSWERS
(T/F)
The D 3665 random number table contains 10,000 numbers listed in order from 0.0001
to 1.0000. - Answers - False (II-2)
"ASTM D 3665 contains all the numbers from 0.0001 to 1.0000 in a *random* order, for
a total of 10,000 numbers.
(T/F)
Random numbers assist the sampler in obtaining samples that are unbiased. - Answers
- True (II-1)
"This standard establishes a procedure for locating samples of construction materials in
a random unbiased manner."
Random samples help to provide a fair and balanced assessment of a lot when
statistical methods are used to determine quality levels
(T/F)
Stratified random sampling procedures are the best and most practical method for
ensuring that samples of construction materials include the full range of a construction
process. - Answers - True (II-1)
(T/F)
A lot is defined as an isolated quantity of material from a single source which is
assumed to be produced or placed by the same controlled process. - Answers - True (II-
4)
A calculator with a random number generator produced the random numbers 0.5534
and 0.2492. The first number is multiplied by ____ and the second number is multiplied
by ____, with the following results:
0.5534 x ____ = _____
0.2492 x ____ = _____ - Answers - First number is multiplied by 500.
Second number is multiplied by 20.
0.5534 x 500 =276.7 , rounded to 277, for row 277
0.2492 x 20 =4.984, rounded to 5, for column 5
(T/F)
Sublots are established to ensure that samples of material obtained from the Lot are
concentrated in one location. - Answers - False (II-1)
"In a stratified method, the lot is divided into the desired number of equal sublots and
each sublot is randomly sampled in accordance with the standard.
VERIFIED ACCURATE ANSWERS
(T/F)
The D 3665 random number table contains 10,000 numbers listed in order from 0.0001
to 1.0000. - Answers - False (II-2)
"ASTM D 3665 contains all the numbers from 0.0001 to 1.0000 in a *random* order, for
a total of 10,000 numbers.
(T/F)
Random numbers assist the sampler in obtaining samples that are unbiased. - Answers
- True (II-1)
"This standard establishes a procedure for locating samples of construction materials in
a random unbiased manner."
Random samples help to provide a fair and balanced assessment of a lot when
statistical methods are used to determine quality levels
(T/F)
Stratified random sampling procedures are the best and most practical method for
ensuring that samples of construction materials include the full range of a construction
process. - Answers - True (II-1)
(T/F)
A lot is defined as an isolated quantity of material from a single source which is
assumed to be produced or placed by the same controlled process. - Answers - True (II-
4)
A calculator with a random number generator produced the random numbers 0.5534
and 0.2492. The first number is multiplied by ____ and the second number is multiplied
by ____, with the following results:
0.5534 x ____ = _____
0.2492 x ____ = _____ - Answers - First number is multiplied by 500.
Second number is multiplied by 20.
0.5534 x 500 =276.7 , rounded to 277, for row 277
0.2492 x 20 =4.984, rounded to 5, for column 5
(T/F)
Sublots are established to ensure that samples of material obtained from the Lot are
concentrated in one location. - Answers - False (II-1)
"In a stratified method, the lot is divided into the desired number of equal sublots and
each sublot is randomly sampled in accordance with the standard.
