Show:
Designing an experiment
Variables
Quantitative & qualitative data
Clinical Trials
Random
100
Is a hypothesis an educated guess, why or why not?
No,it is based on observed facts.
100
Patrick wants to find how long it takes his sister to fall asleep. He is making sure the noise level and the time of day stay constant. What are the variables in this experiment?
time of day, noise level
100
What is the difference between qualitative and quantitative data?
qualitative describes characteristics while quantitative deals with numbers.
100
What is the purpose of a clinical trial? hint* to make sure the medicine is ____ & ________.
safe & effective
100
Which is better, a large sample size or a small sample size?
Large sample size
200
List 3 elements of a good experimental design.
1. Builds on previous knowledge 2. Respects humans 3. large sample size.
200
Name some variables we tried to keep the same in the data toss experiment.
Distance in between partners, Type of throw. etc..
200
Barack Obama is our nations 1st African American president. What is the quantitative data in that sentence?
1st
200
If a scientist wants to conduct an experiment on humans what is one thing he must get from them?
Informed consent
200
Why should you include a control and a treatment group?
So the patients dont know who is really getting the medicine and we can get more accurate results.
300
What does it mean for an experiment to be reproducible?
Another scientist can clearly understand and do your experiment exactly the same over and over again.
300
Maureen wonder which one of her friends can run the fastest. She decides that a race starting at the maple tree & ending at the oaktree will answer her question. Which variable is she planning to control?
distance
300
In a clinical trial what kind of data is more useful?
Quantitative data
300
A placebo is a type of
Control
300
if you were a scientist and invented a new itch cream, what must you do before you can put in on sale for the public?
Conducting clinical trials
400
A scientist is interested in comparing the nervous systems of different types of dogs. What is the scientist most likely to do first?
do some research.
400
How many Variables should you be testing in an experiment?
1
400
By measuring the amount of snow on the ground kim collected what kind of data?
quantitative data
400
Kendrick is thinking about using seawater to water his plants. He places 10 spider plants near a window for 20 days. Each day, he waters five plants with 10mL of seawater and five plants with 10mL of fresh water. He measures their heights before and after the 20 days. How could Kendrick have increased his sample size?
by increasing the number of days
400
What is Human variation?
Human variation is the fact that all humans are different. Everyone has different likes and dislikes, differents thersholds of pain. This is very important to consider when conducting a clinical trial.
500
What is the order of the traditional scientific method?
1. State the problem or question 2.propose an explanation (Hypothesis) 3.collect evidence 4.analyze data 5.draw conclusions
500
Susan conducted an experiment to see if the different types of paper would effect how far a paper airplane would fly. What are some variables she should try to keep constant?
How she throws the plane..etc
500
You lost a puppy and want to put up a "missing animal letter," Name 2 qualitative & 2 quantitative data you would write on this "missing animal letter."
big brown eyes, black spots - qual 2 ft long, 1 collar
500
In a clinical trial, 15 out of 100 patients in the control group got side effects. In the treatment group, 14 out of 100 people also got side effects. Explain what conclusions you can make about the safety of the medicine from this data
The medicine isn’t much less safe than the placebo, since it was almost the same # of people who got side effects in both groups. The side effects are probably not a result of the active ingredient.
500
what is a trade-off?
good vs. the bad