2. Calls for primary care providers (PCP’s) to offer obese patients behavioral weight-loss counseling have not…

2. Calls for primary care providers (PCP’s) to offer obese
The patients aren’t given counseling on behavioral weight-loss.
It should be accompanied with adequate guidance about how this type of care might be achieved
delivered. For weight loss, we conducted a randomized trial.
Two lifestyle interventions were implemented over a two-year period.
both delivered by PCP’s in collaboration with auxiliary health
Lifestyle coaches (professionals) are involved in the practice. There are many ways to help your clients.
Randomly, 259 obese people were assigned to one of the two options by investigators
There are two types of intervention available: enhanced lifestyle counseling and usual care.
To increase your chances of weight loss. Normal care is comprised of
Quarterly PCP visits, which included education on weight
management. (1)
Two brief sessions each month with lifestyle experts, two PCP visits every quarter
Participants were taught by coaches about how to lose weight.
(1) Control and (3) Meal Replacements or Weight-Loss Medicine. You can find the following:
Response variable Y refers to weight loss over 24 months. It is expressed in a
Percentage of the initial weight. That’s, Y is your weight loss.
The patient achieved the stated goal after 24 months.
as a percentage of the patient’s initial weight. The raw data
are not readily available. We will accept that we have to assume certain assumptions
justify the application of two–sample Student’s t methods are

a) Clearly define two relevant population means, µ1 and µ2, with
the subscript 1 indicating “usual care” and the subscript 2
indicating “enhanced lifestyle counseling”.

b) Describe what research you consider appropriate.
hypothesis relating µ1 to µ2. Give a complete and clear explanation of the hypothesis relating u1 to u2.
This is the statement of this hypothesis, in its context
Describe the problem you are trying to solve and why it is relevant. Please note that
In the calculations I used zero for the boundary between null and null
Research hypotheses.

c) To determine if the data are reliable, perform a hypothesis test
Your research hypothesis should be supported. Provide the relevant P–value and
Discuss the issue in detail. d. Provide an explanation.
complete discussion of the 95% confidence interval estimate for µ1
−µ2 in the context of this problem.

usual care: n = 130, Y 1 = 1.6, S1 = 6.8410

Enhanced liefstyle Counseling: n =129. Y 2 = 4.7, S2 =

Test: t value = −3.65, (Two–sided) Pr > |t| = .0004,
(One–sided) Pr < t = .0002,

95% confidence limits for the mean difference: −4.771 ≤ µ1 − µ2
≤ −1.429

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