MIP1501 Assignment 4 questions and answers
where mu represents the mean arsenic level in all chicken meat from that
supplier. Samples from two ditterent suppliers are analyzed, and the
resulting p-value are given.
Sample from Supplier A: p-
value is 0.21 Sample from
Supplier B: p-value is 0.0029
(a) Which
p-value shows stronger evidence for the alternative hypothesis?
2. Ho: p = 0.01
Ha: p < 0.01: A colonoscopy is a screening test for colon cancer,
recommended as a routine test for adults over age 50. A new study
provides the best evidence yet that this test saves lives. The proportion
of people with colon polyps expected to die from colon cancer is 0.01. A
sample of 2602 people who had polyps removed during a colonoscopy
were followed for 20 years, and 12 of them died from colon cancer. Does
this provide evidence that the proportion of people who die from colon
cancer after having polyps removed in a colonoscopy is significantly less
than the expected proportion (without a colonoscopy) of 0.01?
(a) What
are the null and alternative hypotheses?
3. p = .0046: A colonoscopy is a screening test for colon cancer,
recommended as a routine test for adults over age 50. A new study
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, MIP1501 Assignment 4 questions and answers
provides the best evidence yet that this test saves lives. The proportion of
people with colon polyps expected to die from colon cancer is 0.01. A
sample of 2602 people who had polyps removed during a colonoscopy were
followed for 20 years, and 12 of them died from colon cancer. Does this
provide evidence that the proportion of people who die from colon cancer
after having polyps removed in a colonoscopy is significantly less than the
expected proportion (without a colonoscopy) of 0.01?
(b) Whatis the sample proportion? Round your answer to four decimal places
4. p-value equals .004: A colonoscopy is a screening test for colon
cancer, recommended as a routine test for adults over age 50. A new
study provides the best evidence yet that this test saves lives. The
proportion of people with colon polyps expected to die from colon cancer
is 0.01. A sample of 2602 people who had polyps removed during a
colonoscopy were followed for 20 years, and 12 of them died from colon
cancer. Does this provide evidence that the proportion of people who die
from colon cancer after having polyps removed in a colonoscopy is
significantly less than the expected proportion (without a colonoscopy) of
0.01?
5.The figure below shows a randomization distribution for this test. Use
the fact that there are 1000 dots in the distribution to find the p-
value.A new study provides the best evidence yet that this test saves
2/
11
where mu represents the mean arsenic level in all chicken meat from that
supplier. Samples from two ditterent suppliers are analyzed, and the
resulting p-value are given.
Sample from Supplier A: p-
value is 0.21 Sample from
Supplier B: p-value is 0.0029
(a) Which
p-value shows stronger evidence for the alternative hypothesis?
2. Ho: p = 0.01
Ha: p < 0.01: A colonoscopy is a screening test for colon cancer,
recommended as a routine test for adults over age 50. A new study
provides the best evidence yet that this test saves lives. The proportion
of people with colon polyps expected to die from colon cancer is 0.01. A
sample of 2602 people who had polyps removed during a colonoscopy
were followed for 20 years, and 12 of them died from colon cancer. Does
this provide evidence that the proportion of people who die from colon
cancer after having polyps removed in a colonoscopy is significantly less
than the expected proportion (without a colonoscopy) of 0.01?
(a) What
are the null and alternative hypotheses?
3. p = .0046: A colonoscopy is a screening test for colon cancer,
recommended as a routine test for adults over age 50. A new study
1/
11
, MIP1501 Assignment 4 questions and answers
provides the best evidence yet that this test saves lives. The proportion of
people with colon polyps expected to die from colon cancer is 0.01. A
sample of 2602 people who had polyps removed during a colonoscopy were
followed for 20 years, and 12 of them died from colon cancer. Does this
provide evidence that the proportion of people who die from colon cancer
after having polyps removed in a colonoscopy is significantly less than the
expected proportion (without a colonoscopy) of 0.01?
(b) Whatis the sample proportion? Round your answer to four decimal places
4. p-value equals .004: A colonoscopy is a screening test for colon
cancer, recommended as a routine test for adults over age 50. A new
study provides the best evidence yet that this test saves lives. The
proportion of people with colon polyps expected to die from colon cancer
is 0.01. A sample of 2602 people who had polyps removed during a
colonoscopy were followed for 20 years, and 12 of them died from colon
cancer. Does this provide evidence that the proportion of people who die
from colon cancer after having polyps removed in a colonoscopy is
significantly less than the expected proportion (without a colonoscopy) of
0.01?
5.The figure below shows a randomization distribution for this test. Use
the fact that there are 1000 dots in the distribution to find the p-
value.A new study provides the best evidence yet that this test saves
2/
11
