Waiting-list schools as the comparison, stated as a commitment: the Week 6 design memo in PHLT 8044 picks difference-in-differences and lists the threats it leaves open. Searches like "phlt 8044 week 6 assignment example", "phlt8044 week 6 sample" and "phlt 8044 week 6 example" land here.
What a finished PHLT 8044 Week 6 design memo looks like
A three-page memo addressed to the state oral health director. Its subject line carries the chosen design. Beneath it, a paragraph states the question served, decay in first permanent molars, and the comparison: schools already sealing against schools waiting for their wave, measured before and after, with the change in one set against the change in the other. Two alternatives are weighed and set aside, a regression discontinuity around the eligibility cutoff on free or reduced-price meals, rejected because too few schools sit near the line, and a single-group before-and-after, rejected because it cannot separate the program from a statewide trend. A paragraph states the assumption everything rests on, that both sets of schools would have moved in parallel. A threats table closes it.
How a PHLT 8044 Week 6 example is structured
Commitment first, then the reasons, then the admissions. The chosen design appears twice before anything else, in the subject line, then again in the opening paragraph, so even a reader who quits after a few lines knows the choice. Rejections of the alternatives follow, each on grounds specific to this program's rollout and eligibility rules, which shows the choice was made against real options. The parallel trends assumption is given a paragraph to itself, being the one claim the whole comparison depends on, and the memo says how prior screening years at both sets of schools will be used to check it. The threats table follows the categories Shadish, Cook and Campbell made standard, listing selection interacting with history, attrition through children changing schools, and instrumentation if screeners differ between waves. Each threat carries a status: addressed by design, checked by data, or left open.
The comparison, committed to
Participating schools against schools waiting for their wave, each measured before and after, with the program's effect read as the difference between the two changes.
Two designs set aside
Regression discontinuity at the meal-eligibility cutoff, with too few schools near the line, and a single-group before-and-after, unable to separate the program from a statewide trend.
The assumption everything rests on
Parallel movement in decay at both sets of schools absent the program, checked against screening years that predate the first wave.
Threats in standard categories
Selection interacting with history, attrition as children change schools, and instrumentation if screeners differ between waves, each named in Shadish, Cook and Campbell's terms.
A status on every threat
Addressed by design, checked by data or left open, so the director knows before results arrive which doubts the evaluation will still carry.
Where marks go in PHLT 8044 Week 6
Commitment is the first thing graded: a memo that surveys designs without choosing one has not done the week's work. Markers then check the fit between the chosen comparison and the rollout, since a waiting-list comparison only exists if schools really enter in waves. Rejections earn when they cite this program's facts rather than general textbook drawbacks. The parallel trends paragraph carries heavy weight, and a memo that never states its core assumption leaves the reader unable to judge any later result. The threats table is read row by row for statuses; a threat marked addressed with no mechanism named is penalized harder than an honest open. Memos also slip where the named design and the described analysis disagree, and where the memo implies the comparison settles attribution completely.
Get a PHLT 8044 Week 6 example written to your instructions
Forward the Week 6 prompt and rubric and describe how your program rolled out, whether in waves, all at once or by eligibility rule, since that fact decides which comparisons exist. The memo returns in 24-48h, the first without charge. The sealant rollout and its waiting list are fiction unless you swap in a documented program.
PHLT 8044 Week 6 questions, answered
Why not randomize which schools enter first?
In the composite program, the wave order was fixed by hygienist travel routes and district agreements before evaluation was planned, which is common in school programs. The memo notes that randomizing the order of future waves would strengthen the design considerably and recommends asking for it, while committing now to the comparison the current rollout allows.
What if the parallel trends check fails?
The memo says in advance what happens. If earlier screening years show participating and waiting-list schools already diverging, the difference-in-differences estimate is reported with that divergence stated beside it, and the memo names a fallback, comparing each school against its own earlier trend. Deciding this now prevents choosing the fallback only after seeing which answer it gives.
Does the memo include a power calculation?
It flags the need for one and says what it would require: the number of schools in each wave, expected decay rates and how similar children within a school tend to be. Those values belong to a real program, so the sample leaves them as inputs for a statistician rather than inventing figures that would make the calculation look finished.