Question

- Fifty-two specimens of a new chip were tested for speed in a certain application, along with 52 specimens of chips with the old design. The average speed, in MHz, for the new chips was 476.6, and the standard deviation was 17.8. The average speed for the old chips was 456.0 and the standard deviation was 14.9. Test the hypothesis that the mean speed for the new chips is greater than that of the old chips.

- State the null and alternative hypothesis.

- Compute the test statistics.

- Compute the P-value.

- State a conclusion

Answer #1

Fifty-two specimens of a new chip were tested for speed in a
certain application, along with 52 specimens of chips with the old
design. The average speed, in MHz, for the new chips was 488.6, and
the standard deviation was 18.5. The average speed for the old
chips was 477.0 and the standard deviation was 14.9. Test the
hypothesis that the mean speed for the new chips is greater than
that of the old chips.
State the null and alternative...

Fifty specimens of a new chip were tested for speed in a
certain application, along with 50 specimens of chips with the old
design. The average speed, in MHz, for the new chips was 486.6, and
the standard deviation was 18.4. The average speed for the old
chips was 451.6 and the standard deviation was 13.3. Test the
hypothesis that the mean speed for the new chips is greater than
that of the old chips.
State the null and alternative...

Fifty specimens of a new chip were tested for speed in a certain
application, along with 50 specimens of chips with the old design.
The average speed, in MHz, for the new chips was 486.6, and the
standard deviation was 17.4. The average speed for the old chips
was 451.0 and the standard deviation was 13.9. Test the hypothesis
that the mean speed for the new chips is greater than that of the
old chips.
A.) State the null and...

2. Fifty specimens of a new chip were tested for speed in a
certain application, along with 50 specimens of chips with the old
design. The average speed, in MHz, for the new chips was 487.5, and
the standard deviation was 19.6. The average speed for the old
chips was 473.8 and the standard deviation was 17.9. Test the
hypothesis that the mean speed for the new chips is greater than
that of the old chips. a) State the null...

A sample of 60 even older chips had an average speed of 391.2
MHz with a standard deviation of 17.2 MHz. Someone claims that the
new chips average more than 100 MHz faster than these very old
chips. Do the data provide convincing evidence for this claim?
State the appropriate null and alternative hypotheses, use Minitab
to compute the p-value of the test, then state your conclusion. Use
a significance level of α=.05.
Please solve using minitab and show the...

A researcher claims that the average wind speed in a certain
city is 8 miles per hour. A sample of 32 days has an average wind
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average wind speed in a certain city is different from 8 miles per
hour?
a) state the hypothesis
b) calculate the test statistic

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enough evidence to reject the claim? Determine the null hypothesis,
the p-value, and state your conclusion.

To obtain information on the corrosion-resistance properties of
a certain type of steel conduit, 45 specimens are buried in soil
for a 2-year period. The maximum penetration (in mils) for each
specimen is then measured, yielding a sample average penetration of
x = 52.3 and a sample standard deviation of s =
4.2. The conduits were manufactured with the specification that
true average penetration be at most 50 mils. They will be used
unless it can be demonstrated conclusively that...

To obtain information on the corrosion-resistance properties of
a certain type of steel conduit, 45 specimens are buried in soil
for a 2-year period. The maximum penetration (in mils) for each
specimen is then measured, yielding a sample average penetration of
x = 53.2 and a sample standard deviation of s =
4.2. The conduits were manufactured with the specification that
true average penetration be at most 50 mils. They will be used
unless it can be demonstrated conclusively that...

The effectiveness of a new treatment was tested against the
existing procedure for Alzheimer's patients. A study randomized 13
patients to the new treatment and 18 patients to the existing.
After 3 years, all patients relapsed, and Alzheimer's symptoms
re-occurred. The average time-to-relapse was X_bar1=18.6 months
under the new treatment and X_bar_2=10.1 months under the existing
procedure, with observed standard deviation s_1=3 and s_2=3.2.
To test the difference between the mean relapse time of the new
treatment and the standard...

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