# data[].attributes.body
Does the brand of shampoo and conditioner used on a horse’s tail effect its growth?

# data[].attributes.body
40 horses that were selected based off owners willingness ti volunteer their time and horses for this experiment. So, my units were based off more of volunteer then randomly selected.

# data[].attributes.body
With a sample size of 40 horses, I yield a margin of error at 16%. This margin is a little high due to my sample size not being veyr big so my results may not be spot on but they will be relatively close.

# data[].attributes.body
My control group for this experiment are the 20 horses that are have their tails rinsed out wiht only water every week for two months.

# data[].attributes.body
The explanatory variable in this experiment is the brand of shampoo and conditioner used on the horse’s tail.

# data[].attributes.body
The response variable is the amount the the rail grows within the two month period.

# data[].attributes.body
In order to select the 40 horses used for this experiment, I had gone to a boarding barn that housed more then 40 horses. I went around to the owners at the barn and asked of they would like to participate in an experiment I was conducting. I would explain the experiment and if they agreed I would either randomly give them a specific brand of shampoo or conditioner or I would tell them to just simply rinse their horse’s tail.

# data[].attributes.body
For this experiment there really wasnt a blind variable or placebo due to the fact that the owners were aware of what brand of shampoo and conditioner they were using if they were told to use any. The only thing that could really be considered a blind variable in this experiment is the owners prior to receiving a brand of shampoo and conditioner (if they did) were not aware of what brand they were going to be recieving since the brands were handed out at random.

# data[].attributes.body
Since horses were chosen at random to be a control or to use shampoo and conditioner and what brand was used, the amount of growth that was seen with the group treated couldn’t have been random. It was consistent throughout the treated group that the tail grew more then the controlled group.

# data[].attributes.body
A lurking variable that may be in this experiment is what breed the horse is. Some breeds of horses have tails that will grow faster then other, this could effect the results within the study. Another lurking variable that could effect results within this experiment is the horse’s age. Older horses ten to have more trouble growing hair, which could effect the results I recieve.

# data[].attributes.body
40 horses were chosen based on owners willingness to participate in the experiment at a boarding barn. 5 horses were chosen at random to have their tail washed weekly for two month with Mane ‘n Tail, 5 were chosen at random to have their tails washed weekly for two months with Cowboy Magic, 5 were chosen at random to have their tail washed weekly for two months with Cabellina Del Caballo, 5 were chosen to have their tails washed weekly for two month with Cavalier, and 20 were chosen to have their tails just rinsed weekly for two months. All 40 owners were asked that after their weekly tail washings to brush, braid, and put their horses tail in to a tail bag to help keep it clean and protect it from outside elements.

# data[].attributes.body
After two months of testing, it was obvious that using shampoo and conditioner on a horse’s tail will help it grow longer. The control group only grew an average of 4 inches while everyone using shampoo and conditioner grew longer than that. Out of all the brands, Cowboy Magic was the brand that helped the horse’s tail grow the longest by a significant amount. It helped their tail grow an average of 10 inches over a two month period.

# data[].attributes.body
The randomized variable in this experiment is the random hand out of brand of shampoo and conditioner. I had no real rhyme or reason to how I was handing them out, I would just alternate between handing out a brand of shampoo and conditioner and telling the owner to simply rinse the tail with just water.

# data[].attributes.body
Many of the owners of these horses decided to make the switch to Cowboy Magic Shampoo and Conditioner since it proved to be the most effective on tail growth. They saw significant growth in their horse’s tail and even in their mane and were satisfied with the findings.

# data[].attributes.body
For this experiment, I set it up for half of the horses were using some brand of shampoo and conditioner and half of them were using just water. I then paired a horse that was using a brand of shampoo and conditioner up with a horse whose tail was just being rinsed out with water.

# data[].attributes.body
I could replicate this experiment to better back up my data from this experiment, however it would be almost unrealistic for me to do so. It would be very challenging for me to find another boarding barn with enough horses and willing owners to conduct this experiment. It would also be too expensive for me to buy enough shampoo and conditioner bottles to repeat this study.

# data[].attributes.body
It is possible to perform a crossover in this experiment, all I would have to do is after the two months is up, rotate the brands of shampoo and conditioner the horses are using and have the owners repeat washing thier tails with the new brand weekly for two months to see if the new brand had and effect on the horse’s tail. Although this is possible, it would be far too expensive for me to attempt to do. I also risk the chance of owners becoming unwilling to participate any longer because it is a lot to ask a horse owner to wash, brush, braid, and bag a horse’s tail weekly for two months. The weather also has the chance of changing and neither horse nor owner will want to stand outside during the winter time and wash a tail weekly for another two months.