Question

A sample of 1200 computer chips revealed that 49% of the chips fail in the first 1000 hours of their use. The company's promotional literature states that 50% of the chips fail in the first 1000 hours of their use. The quality control manager wants to test the claim that the actual percentage that fail is below the stated percentage. Is there enough evidence at the 0.05 level to support the manager's claim?

Step 1 of 7:

State the null and alternative hypotheses.

Answer #1

as test statistic does not fall in rejection region we cannot reject null hypothesis

we do not have evidence at 0.05 level to support the manager's claim

A sample of 900 computer chips revealed that 59% of the chips
fail in the first 1000 hours of their use. The company's
promotional literature states that 62% of the chips fail in the
first 1000 hours of their use. The quality control manager wants to
test the claim that the actual percentage that fail is less than
the stated percentage. Is there enough evidence at the 0.10 level
to support the manager's claim?
Step 1 of 7:
State the...

A sample of 1100 computer chips revealed that 70% of the chips
do not fail in the first 1000 hours of their use. The company's
promotional literature states that 73% of the chips do not fail in
the first 1000 hours of their use. The quality control manager
wants to test the claim that the actual percentage that do not fail
is different from the stated percentage. Is there enough evidence
at the 0.05 level to support the manager's claim?

A sample of 16001600
computer chips revealed that 50%50% of the chips do not fail in the
first 10001000 hours of their use. The company's promotional
literature states that 48%48% of the chips do not fail in the first
10001000 hours of their use. The quality control manager wants to
test the claim that the actual percentage that do not fail is more
than the stated percentage. Is there enough evidence at the
0.020.02 level to support the manager's claim?...

A sample of 900 computer chips revealed that 49% of the chips do
not fail in the first 1000 hours of their use. The company's
promotional literature states that 48% of the chips do not fail in
the first 1000 hours of their use. The quality control manager
wants to test the claim that the actual percentage that do not fail
is over the stated percentage. Is there enough evidence at the 0.10
level to support the manager's claim?
Step...

A sample of 1600 computer chips revealed that 78% of the chips
do not fail in the first 1000 hours of their use. The company's
promotional literature states that 77% of the chips do not fail in
the first 1000hours of their use. The quality control manager wants
to test the claim that the actual percentage that do not fail is
more than the stated percentage. Is there enough evidence at the
0.02 level to support the manager's claim?
State...

A sample of 1600 computer chips revealed that 56% of the chips
fail in the first 1000 hours of their use. The company's
promotional literature states that 59% of the chips fail in the
first 1000 hours of their use. The quality control manager wants to
test the claim that the actual percentage that fail is different
from the stated percentage. Make the decision to reject or fail to
reject the null hypothesis at the 0.02 level.

A sample of 1300 computer chips revealed that 40% of the chips
fail in the first 1000 hours of their use. The company's
promotional literature states that 37% of the chips fail in the
first 1000 hours of their use. The quality control manager wants to
test the claim that the actual percentage that fail is different
from the stated percentage. Make the decision to reject or fail to
reject the null hypothesis at the 0.02 level.

A sample of 1700 computer chips revealed that 43% of the chips
do not fail in the first 1000 hours of their use. The company's
promotional literature states that 44% of the chips do not fail in
the first 1000 hours of their use. The quality control manager
wants to test the claim that the actual percentage that do not fail
is different from the stated percentage. Is there enough evidence
at the 0.05 level to support the manager's claim?...

A sample of 900 computer chips revealed that 68%68% of the chips
fail in the first 1000 hours of their use. The company's
promotional literature states that 67% of the chips fail in the
first 1000 hours of their use. The quality control manager wants to
test the claim that the actual percentage that fail is different
from the stated percentage. Find the value of the test statistic.
Round your answer to two decimal places.

A sample of 1800 computer chips revealed that 41% of the chips
do not fail in the first 1000 hours of their use. The company's
promotional literature states that 44% of the chips do not fail in
the first 1000 hours of their use. The quality control manager
wants to test the claim that the actual percentage that do not fail
is different from the stated percentage. Find the value of the test
statistic. Round your answer to two decimal...

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