Question

A survey reveals that trauma patients who seek care at an urban health and wellness clinic experienced differing rates of wound healing. Specifically, over a 4-week period, 40% reported 0-25% wound healing, 30% reported 26-50% wound healing, 20% reported 51-75% wound healing, and 10% reported 76-100% wound healing. Researchers recruit a sample of 250 participants into an observational study and assesses their wound healing again after 4-weeks. The results are displayed in the table below:

Percent Wound Healing |
0-25% |
26-50% |
51-75% |
76-100% |

Number of Patients |
110 |
70 |
50 |
20 |

Is there evidence at the 5% level to suggest that the distribution of wound healing in this sample is different from those from the previous study?

a. Set up hypotheses and determine level of significance

b. Compute the test statistic

c. Compute expected values

Answer #1

Expected Values are calculated for different classes by multiplying by expected percentage to 250 i.e. for class 0-25% expected frequency = 250*0.4 and similarly values are calculated for other classes.

Percent Wound Healing | Observed Frequency | Expected frequency | (Oi - Ei)^2/Ei |

0-25% | 110 | 250 * 0.4 = 100 | 1 |

26-50% | 70 | 250 * 0.3 = 75 | 0.33 |

51-75% | 50 | 250 * 0.2 = 50 | 0 |

76-100% | 20 | 250 * 0.1 = 25 | 1 |

2.33 |

Test statistic, chi-square = sum((Oi - Ei)^2/Ei) = 2.33

Significance level is 0.05

p-value = 0.5062

As p-value > 0.05, fail to reject H0

There are not significant evidence to conclude that the distribution is different from those from the previous study

A survey reveals that trauma patients who seek care at an urban
health and wellness clinic experienced differing rates of wound
healing. Specifically, over a 4-week period, 40% reported 0-25%
wound healing, 30% reported 26-50% wound healing, 20% reported
51-75% wound healing, and 10% reported 76-100% wound healing.
Researchers recruit a sample of 250 participants into an
observational study and assesses their wound healing again after
4-weeks. The results are displayed in the table below:
Percent Wound Healing
0-25%
26-50%...

The following data were collected in a clinical trial evaluating
a new compound designed to improve wound healing in trauma
patients. The new compound is compared against a placebo. After
treatment for 5 days with the new compound or placebo the extent of
wound healing is measured and the data are shown below.
Percent Wound Healing
Treatment
0-25%
26-50%
51-75%
76-100%
New Compound (n=125)
15
37
32
41
Placebo (n=125)
36
45
34
10
Is there a difference in the...

Findings In a cohort of 2215 adults
with COVID-19 who were admitted to intensive care units at 65
sites, 784 (35.4%) died within 28 days, with wide variation among
hospitals. Factors associated with death included older age, male
sex, morbid obesity, coronary artery disease, cancer, acute organ
dysfunction, and admission to a hospital with fewer intensive care
unit beds.
Meaning This study identified
demographic, clinical, and hospital-level factors associated with
death in critically ill patients with COVID-19 that may be used to...

What is Medicare Part C?
Provides the aged with home health care
Provides the aged with prescription drugs
Enables low-income aged to participate in Medicaid
Provides a voluntary managed care option for the aged
How is Medicaid financed?
It is financed entirely by the federal government.
It is financed entirely by the state.
States receive the same percentage of federal support.
States with lower per capita incomes receive a greater
percentage of federal support
If a healthcare system is "free"...

The file P17_05.xlsx contains data on 100 consumers who drink
beer. Some of them prefer light beer, and others prefer regular
beer. A major beer producer believes that the following variables
might be useful in discriminating between these two groups: gender,
marital status, annual income level, and age. b. Consider a new
customer: male, married, income $42,000, age 47. Use the logistic
regression equation to estimate the probability that this customer
prefers Regular. How would you classify this person?
Individual...

A physiological experiment was concluded to study the effect of
various factors on a pulse rate. The participants took their own
pulse. They then were asked to flip a coin. If their coin came up
head, they were to run in place for 1 minute. Then everyone took
their own pulse again. The dataset pulse.txt, available from
Moodle, contains the following variables: ROW- id numbers, from 1
to 92; PULSE1- first pulse rate; PULSE2- second pulse rate;
RAN-1=ran in place,...

Q) Over the past few years the percentage of students who leave
Lakeland College at the end of the first year has increased. Last
year Lakeland started a voluntary one-week orientation program to
help first-year students adjust to campus life. If Lakeland is able
to show that the orientation program has a positive effect on
retention, they will consider making the program a requirement for
all first-year students. Lakeland’s administration also suspects
that students with lower GPAs have a higher...

Pat.#
Before
After
1
195
125
To the left is 2 datasets measured for
a sample of 107 patients with the high cholesterol level before and
after taking medication. Obtain the following for both sets:
2
208
164
3
254
152
1- the mean, mode and median
4
226
144
5
290
212
2- the variance and standard
deviation
6
239
171
7
216
164
3- First, second and third
quartiles
8
286
200
9
243
190
10
217
130...

Suppose that a local chapter of sales professionals in the
greater San Francisco area con- ducted a survey of its membership
to study the relationship, if any, between the years of experience
and salary for individuals employed in inside and outside sales
positions. On the survey, respondents were asked to specify one of
three levels of years of experience: low (1–10 years), medium
(11–20 years), and high (21 or more years). A portion of the data
obtained follows. The complete...

________ client-centered therapy centers on the patient's goals
and ways of solving problems.
Select one:
a. Rogers'
b. Freud's
c. Beck
d. Ellis
Question 2
Not yet answered
Points out of 1.00
Flag question
Question text
A frequently prescribed drug therapy for managing one's
depression is ____________.
Select one:
a. Adderall
b. Lithium
c. Prozac
d. Thorazine
Question 3
Not yet answered
Points out of 1.00
Flag question
Question text
A major goal of modern inpatient psychiatric treatment is:
Select...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 16 minutes ago

asked 24 minutes ago

asked 52 minutes ago

asked 55 minutes ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 3 hours ago

asked 3 hours ago

asked 3 hours ago

asked 3 hours ago

asked 3 hours ago