200 students volunteer for an experiment to test the effects o...

Question

200 students volunteer for an experiment to test the effects of sleep deprivation on memory recall. The students will be placed in one of five different treatment groups, including the control group.

Explain how you could design an experiment so that it uses a randomized block design.

Accepted Answer

Welcome back, everyone. To study the effects of different diets on energy levels, 150 volunteers agreed to participate in an experiment. They will be assigned to one of 4 diet groups, including a control group. Describe how you could design this experiment using a randomized block design. A says to assign diets based on participants' preference rather than randomization. B use only the youngest participants for the experiment. Croup participants by age and randomly assign them to diets within each block. And D says to assign diets randomly without considering age differences. Now, before we choose an answer, let's first define the randomized block design. What do we remember? What does that mean? We recall that in a randomized block design. It reduces variability by group by grouping participants, OK, so it groups participants. With similar characteristics. OK. Into blocks, OK, into blocks before. Assigning treatments, signing treatments within each block. Now, this design reduces variability and it ensures that differences between the blocks do not affect the results. So how can we apply that? Let me write that properly here, treatments. How can we apply that to our problem? Well, notice here that we're studying the effects of on different of different diets on energy levels. And the best way to block energy levels is that we can block by age because energy levels are affected by age. So let's create our blocks, OK? Create blocks. Based on energy groups. Uh sorry, based on age groups. Now, when we do that age groups, I don't know why I'm not writing so well today, but based on age groups, yeah. Now how can we design that? Well, within each block we can randomly assign participants to one of the four diet groups, including the control group, and we can ensure that each block has an equal number of participants in each treatment group to maintain balance while monitoring the energy levels of participants over a specified period and compare the outcomes across groups. This design minimizes the effect of age-related variability on energy levels, ensuring that differences in energy are more likely due to diet treatments rather than age differences. Therefore, that tells us that C is the correct answer. Thanks a lot for watching everyone. I hope this video helped.

��app

200 students volunteer for an experiment to test the effects of sleep deprivation on memory recall. The students will be placed in one of five different treatment groups, including the control group.
Explain how you could design an experiment so that it uses a randomized block design.

Key Concepts

Randomized Block Design

Control Group

Random Assignment

Watch next

����app

200 students volunteer for an experiment to test the effects of sleep deprivation on memory recall. The students will be placed in one of five different treatment groups, including the control group.Explain how you could design an experiment so that it uses a randomized block design.