Hello professor,

1. I will post the question of the discussion for you with all the requirements needed for it, so please read them carefully and follow them all and do it.

2. Please follow the directions that my teacher wants us to do when we do the discussion I will post them all for you after I post the discussion question for you.

3. I will send you my (Canvas) username and password to read the stuff that she wants us to read from canvas for this discussion.

4. I need you to write all with your own words and I don’t need any plagiarism pleaseee.

5. Please contact me if you need anything or if you want me to send you more information about the discussion.

Learn by Doing

Here are the directions, grading rubric, and definition of high-quality feedback for the Learn by Doing discussion board exercises.

Context

A high school student named David Merrell did an experiment to examine if music affects the ability of rats to run a maze. The explanatory variable was exposure to music. He had three treatment groups: one group listened to heavy metal music by the group Anthrax. A second group listened to Mozart. The third group never heard music. This last group is the control group.

The response variable was the average time (in seconds) to complete three runs. Every week the rats ran the maze three times. Merrell recorded each rat’s average time for the week.

Direct controls of potential confounding variables:

• Merrell trained all of the rats to run the same maze.
• He gave all mice the same amount of food and light.
• All mice had the same approximate age and weights.
• During the treatment phase, the rats were exposed to the treatment for the same amount of time, e.g. rats heard music at 70 decibels for 10 hours a day for a month.

Results:

By the end of the month the Anthrax group was much slower at running the maze. The Mozart group was much faster. The dotplots below show average run times for the first and last week of the experiment. Each dot represents one rat. The X-value is the rat’s average run time for the week. (Each rat ran the maze 3 times each week.) The blue line is the mean run time for each treatment group.

If you are curious, here is a video of Merrell explaining his experiment.Merrell explaining his experiment (Links to an external site.)

(captioned version (Links to an external site.))

Prompt

Merrell claims that he randomly assigned rats to treatment groups. Does the data shown in the dotplots above support his claim? Why or why not?

Grading

To view the grading rubric for this discussion board, click on menu icon (three vertical dots) and then select show rubric. Please note, if viewing the course via the Canvas mobile app the rubric does not appear on this page.

Tips for Success

• • • To post your initial post, click the “reply” button at the top of the introduction thread below.
    • You are required to reply to two of your peers in this discussion; don’t forget to complete this requirement of the activity or you will lose points. Provide high-quality feedback to your peers.