Devon wants to know if drinking milk before bed helps teenagers sleep. He chooses 10 friends on his high school basketball team for his study. Every night for one month, the friends drink a glass of milk before bed and later record how many hours they slept that night.
Describe three resasons why devon's study designs is flawed.

Question

Devon wants to know if drinking milk before bed helps teenagers sleep. He chooses 10 friends on his high school basketball team for his study. Every night for one month, the friends drink a glass of milk before bed and later record how many hours they slept that night.
Describe three resasons why devon's study designs is flawed.

dtan5457 · Answer

1. he specifically gave it to athletes not the general public of teenagers
2. way to little people to make a conclusion for something like sleep
3. does not state how many hours they are suppose to get, or how they will even record such a thing

anonymous · Answer

@dtan5457 Thank you so much!!!!!!

anonymous · Answer

@dtan5457 can you help me with this one? 
it's from the same problem. 
After one month, Devon finds that his 10 friends slept and average of 0.5 hour more each night when they drank milk before bed. Based on this, Devon concludes that drinking milk makes teenagers sleepy. What is one reason why Devon's conclusion is most likely invalid?

dtan5457 · Answer

the first 2 reasons i used still work for this.

3. sleeping more can not be determined from milk, especially as they are athletes, they need more sleep.

anonymous · Answer

@dtan5457 last one! lol sorry to bother you
A study conducted by a major milk manufacturer showed that 83% of American teenages prefer drinking milk to drinking soda. What are two reasons why this statistic cannot be trusted?