Question

A sample of 1500 computer chips revealed that 71% of the chips fail in the first 1000 hours of their use. The company's promotional literature claimed that under 74% fail in the first 1000 hours of their use. Is there sufficient evidence at the 0.05 level to support the company's claim? State the null and alternative hypotheses for the above scenario.

Answer #1

Here the claim is that less than 74% chips fail in the first 1000 hours.As the null hypothesis always has an equal sign null and alternate hypothesis are:

Now the test statistic

Degree of freedom =1500-1=1499

P-value for z value(-2.649) and d.f(1499) is 0.004.

As P-value(0.004) is less than alpha(0.05) we reject the null hypothesis

So we have enough evidence to support the claim that under 74% of the chips fail in the first 1000 hours of their use

A sample of 1500 1500 computer chips revealed that 26 % of the
chips fail in the first 1000 hours of their use. The company's
promotional literature claimed that 29 % fail in the
first 1000 1000 hours of their use. Is there sufficient evidence at
the 0.05 level to dispute the company's claim? State the null and
alternative hypotheses for the above scenario.

A sample of 1600 computer chips revealed that 50% of the chips
fail in the first 1000 hours of their use. The company's
promotional literature claimed that under 53% fail in the first
1000 hours of their use. Is there sufficient evidence at the 0.02
level to support the company's claim? State the null and
alternative hypotheses for the above scenario.

A sample of 800 computer chips revealed that 80% of the chips do
not fail in the first 1000 hours of their use. The company's
promotional literature claimed that over 76% do not fail in the
first 1000 hours of their use. Is there sufficient evidence at the
0.02 level to support the company's claim? State the null and
alternative hypotheses for the above scenario.

A sample of 1300 computer chips revealed that 43% of the chips
do not fail in the first 1000 hours of their use. The company's
promotional literature claimed that more than 40% do not fail in
the first 1000 hours of their use. Is there sufficient evidence at
the 0.10
level to support the company's claim?
State the null and alternative hypotheses for the above
scenario.

A sample of 1200 computer chips revealed that 50% of the chips
do not fail in the first 1000 hours of their use. The company's
promotional literature claimed that more than 47% do not fail in
the first 1000 hours of their use. Is there sufficient evidence at
the 0.10 level to support the company's claim? State the null and
alternative hypotheses for the above scenario.

A sample of 800 computer chips revealed that 40% of the chips do
not fail in the first 1000 hours of their use. The company's
promotional literature claimed that more than 35% do not fail in
the first 1000 hours of their use. Is there sufficient evidence at
the 0.02 level to support the company's claim? State the null and
alternative hypotheses for the above scenario.
Ho:____________________
Ha:____________________

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...

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 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 1500 computer chips revealed that 28% of the chips
do not fail in the first 1000 hours of their use. The company's
promotional literature states that 30% 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. Determine the decision
rule for rejecting the null hypothesis, H0, at the 0.02...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 18 minutes ago

asked 34 minutes ago

asked 57 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago