Answer:
Collins walked an average of 8.3 miles per hour
Answer:
The groups of subjects are similar, on average, in all respects before applying the different treatments to the different groups
Step-by-step explanation:
Randomization is a technique employed by researchers, which seeks to measure the effect of a treatment on a particular variable. The group is divided into the control and treatment groups. Treatment is administered to each group, and the effect is compared between them. The most important value of randomization is that it ensures that the groups who would be receiving treatments are similar on average to prevent bias caused by systematic differences. It also helps to ensure that each participant in the study has an equal chance of being selected for the study thus eliminating selection bias.
Randomization ensures that both participants and researchers do not have prior knowledge of the experiment which might influence their response to treatment.
The rate that Marcus works is (1/3) of the job in (4/5) of an hour....
(1/3)/(4/5)=1/h
(1/3)(5/4)=1/h
5/12=1/h
5h=12
h=12/5
So Marcus will take 12/5 hours to complete the job.
I can’t help you because I can’t see the problem.
