Answer:
B. The observational study is a cross-sectional study because information is collected at a specific point in time.
Step-by-step explanation:
1) There are three types of Observational Studies: Case-control, cross-sectional and Cohort.
2) Since the researchers collected information from those 1800 adults at a certain time, then we can call it a cross-sectional study. It does not provide solid results since the research was not done over a period to collect further information. We don't know, for example, much more than what that association deeply mean.
3) If we wonder more, then the researchers would have to track those adults over a given period, i.e. a Cohort would be necessary.
4) Moreover, it's not "retrospective" for virtually every question, always makes us look back somehow, and it does not categorize a kind of observational study.
(2x-1)×4=8x-4
I hope it helps ;)
Answer:
the first answer is correct answer
Step-by-step explanation:
There can only be 2 location which is to the right and to the left, this is because it means the difference between is 9. So the two answers are…
13
And
-13
<h2>
Answer:CAN YOU PLEASE HELP ME!!????</h2>
Step-by-step explanation:What percent is represented by the diagram below?
Alternative text
A. 13%
B. 65%
C. 130%
<h3>
D. 650%</h3>
