Volunteers for a human performance study were randomly divided into two groups. The first group had their flexibility measured in the morning after a short meditation session while the second group had their flexibility measured in th
afternoon with no previous meditation session. The flexibility scores of the two groups were compared.
To improve the design of this experiment, one part of it should be done in a blind way. That is, we should
O not tell volunteers in advance what treatment they may be exposed to.
Obe sure that the person measuring the volunteers' flexibility doesn't know which ones meditated and which ones didn't.
O not allow the volunteers to find out their flexibility scores.
O tell all of the volunteers who meditate they will get a gym membership if they work very hard on the flexibility test.

true? is that what you're asking or do you mean something else?

answer set (b) 0.5, 3/4 80% is in order from least to greatest.  

step-by-step explanation:

in order to compare rational numbers to each other, it is much easier if they are in the same form.   typically, the best form in which to evaluate rational numbers is in decimals.   in order to convert a percent to a decimal, you would divide the given percentage by 100.   you can also accomplish the conversion by moving the decimal point over two places to the left.   for example, the decimal value of 80% is 80/100, or 0.8.   in order to convert a fraction to a decimal, you need to divide the numerator by the denominator.   for example, 3/4 is 0.75.   so, for choice (b) 0.5 3/4 (0.75), 80% (0.8) is the only choice in which the numbers are in order from least to greatest.  

6 hours 48 min

step-by-step explanation:

68÷5=13.6

13.6×30=408min=6 hours 48 min.

hope to and hope that my answer is brainliest.(follow me )