Which type of study best describes the following research most likely to be done?
a researcher is testing new weight loss supplements. the researcher decides to sample two groups. the first
group of subjects, the researcher labeled group 'a: the researcher plans to give a placebo that looks like the
real medicine but is just a sugar pill to group 'a: the second group, group 'b', will be given the real medicine.
the researcher knows which participants got the placebo and which received treatment but the participants
don't know.
blind study
o double blind study
© open study
closed study

Blind Study

Step-by-step explanation:

The answer is blind study because in a double blind study neither the subjects or the researchers know the control group. in an open study everyone knows who is in the control group.

Blind Study

Step-by-step explanation:

Blinded study: A study done in such a way that the patients or subjects do not know (is blinded as to) what treatment they are receiving to ensure that the results are not affected by a placebo effect

(Hope I Helped!)

b: |12 – x| ≤ 0.25

step-by-step explanation:      

let x be the possible lengths in inches, of the ribbons jaime cut.

we have been given that jaime is cutting strips of ribbon for a project. he tries to cut each piece to be 12 inches long, but sometimes he cuts it too long or too short by as much as 0.25 inch.  

we can represent this information in an inequality as:

by the definition of absolute value function we will get,

upon combining our inequalities we will get,

therefore, the inequality   describes all the possible lengths (x), in inches, of the ribbons jaime cut.

step-by-step explanation: