Question

A researcher is conducting a study on the palliative care of patients at a specific facility to determine how their chronic pain symptoms change after entering the palliative care environment. This study is aimed at determining the effectiveness of a standardized treatment protocol for the patients entering into the palliative care environment. To do this, the researcher is comparing the pain scores of individuals before treatment and after treatment. Set up a Wilcoxon signed-ranks test and interpret it at the alpha equals .05 level.

A) We fail to reject H0, which states the median difference in the pain scores before and after treatment are equal because 1 is less than the critical value 10 for a Wilcoxon signed-ranks test with a population of only 11 individuals.

B) We fail to reject H0, which states the median difference in the pain scores before and after treatment are equal because 45 is greater than the critical value 44 for a Wilcoxon signed-ranks test with a population of only 11 individuals.

C) We reject H0 in favor of H1, which states the median difference in pain scores before and after treatment are not equal because 1 is less than the critical value 10 for a Wilcoxon signed-ranks test with a population of only 11 individuals.

D) We reject H0 in favor of H1, which states the median difference in pain scores before and after treatment are not equal because 44 is greater than the critical value 10 for a Wilcoxon signed-ranks test with a population of only 11 individuals.

Answer #1

before | after | differnence(d) | |d| | Rank | signed rank |

9 | 4 | 5 | 5 | 8 | 8 |

10 | 5 | 5 | 5 | 8 | 8 |

7 | 3 | 4 | 4 | 5 | 5 |

8 | 5 | 3 | 3 | 3 | 3 |

6 | 7 | -1 | 1 | 1 | -1 |

9 | 5 | 4 | 4 | 5 | 5 |

6 | 4 | 2 | 2 | 2 | 2 |

7 | 3 | 4 | 4 | 5 | 5 |

9 | 4 | 5 | 5 | 8 | 8 |

sum of positive ranks | ΣW+ | 44 | ||

sum of negative ranks | ΣW- | 1 |

C) We reject H0 in favor of H1, which states the median difference in pain scores before and after treatment are not equal because 1 is less than the critical value 10 for a Wilcoxon signed-ranks test with a population of only 11 individuals.

5. A researcher is conducting a study on the palliative care of
patients at a specific facility to determine how their chronic pain
symptoms change after entering the palliative care environment.
This study is aimed at determining the effectiveness of a
standardized treatment protocol for the patients entering into the
palliative care environment. To do this, the researcher is
comparing the pain scores of individuals before treatment and after
treatment. Set up a Wilcoxon signed-ranks test and interpret it at...

Number of Reported Side-Effects
Old Drug
0
1
3
3 5
New Drug
0
0
1
2 4
Old Drug
New Drug
Total Sample
(Ordered Smallest to Largest)
Ranks
Old Drug
New Drug
Old Drug
New Drug
R1=
R2=
A new drug for the treatment of dyspnea, labored breathing, is
being tested within a given palliative care population. The new
drug is being compared to an already approved drug used to treat
dyspnea that is commonly used in...

A researcher is interested in noting the differences in IBS
symptoms among individuals with IBS-D based on their diets. The
researcher decides to compare those individuals on a normal diet to
those individuals on a low FODMAP diet. Run a Mann-Whitney U test
at the alpha equals 05 level and interpret the results.
We fail to reject H0, which states the two populations are equal
at the alpha equals .05 level because the calculated U value of 4.5
is greater...

Researchers studied symptom distress and palliative care
designation among a sample of 710 hospitalized patients.
Controlling for age, they used a t-test to compare average distress
from nausea scores in men and women. Lower scores indicated less
distress from nausea. They report men had an average score of 1.02
and woman had an average score of 1.79. Which statement is
correct?
men had significantly less distress from nausea.
Men had half as much distress from nausea as woman but we...

. A new chemotherapy drug is released to treat leukemia and
researchers suspect that the drug may have fewer side effects than
the most commonly used drug to treat leukemia. The two drugs have
equivalent efficacy. In order to determine if a larger study should
be conducted to look into the prevalence of side effects for the
two drugs, set up a Mann-Whitney U test at the alpha equals .05
level and interpret its results. Number of Reported Side-Effects
Old...

Some researchers claim that herbal supplements improve human
memory. To test this claim, a researcher selects a sample of n = 25
college students. Each student is given herbal supplements daily
for 6 weeks and then all the participants are given a standardized
memory test. For the population, scores on the tests are normally
distributed with µ = 70 and σ= 15. The sample of n = 25 students
had a mean score of M = 75. Can we conclude...

Question #3
A researcher is conducting and experiment to evaluate a
treatment that is expected to increase the scores for individuals
in a population. If the researcher uses a one-tailed test with ( a
= .01), then which of the following correctly identifies the
critical region?
A. z > 2.33
B. z > 2.58
C. z < 2.33
D. z < 2.58
Question #4
A researcher evaluates a treatment effect using a two tailed
hypothesis test with ( a =...

An observational study of Alzheimer's disease (AD) obtained
data from 12 AD patients exhibiting moderate dementia and selected
a group of 11 control individuals without AD. AD is a progressive
neurodegenerative disease of the elderly and advancing age is known
to be a primary risk factor in AD diagnosis. Therefore, it was
crucial for the study's credibility to examine whether the ages in
the AD group might be significantly different than in the control
group. The ages of the subjects...

A standardized exam consists of three parts: math, writing, and
critical reading. Sample data showing the math and writing scores
for a sample of 12 students who took the exam follow.
Student
Math
Writing
1
540
468
2
432
374
3
528
463
4
574
612
5
448
420
6
502
526
7
480
430
8
499
459
9
610
615
10
572
541
11
390
335
12
593
613
(a)
Use a 0.05 level of significance and test for...

An observational study of Alzheimer's disease (AD) obtained
data from 8 AD patients exhibiting moderate dementia and selected a
group of 6 control individuals without AD. AD is a progressive
neurodegenerative disease of the elderly and advancing age is known
to be a primary risk factor in AD diagnosis. Therefore, it was
crucial for the study's credibility to examine whether the ages in
the AD group might be significantly different than in the control
group. The ages of the subjects...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 27 minutes ago

asked 28 minutes ago

asked 31 minutes ago

asked 44 minutes 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

asked 2 hours ago