EXERCISE 2: TESTABLE OBSERVATIONS
Determine which of the observations below are testable. For those that are testable:
Determine if the observation is qualitative or quantitative.
Write a hypothesis and a null hypothesis.
What is your experimental approach?
What are the dependent and independent variables?
What are your controls, both positive and negative?
How will you collect your data?
How will you present your data (e.g., chart, graph, type)?
How will you analyze your data?
A plant grows three inches faster per day when placed on a window sill than it does when placed on a coffee table in the middle of the living room. TESTABLE
Hypothesis – The plant will grow at a faster rate per day when it is placed on a window sill as opposed to being placed on a coffee table in the middle of a living room
Null Hypothesis – The location of the plant has no bearing on the growth rate per day
Experimental Approach – I would gather for identical plants, two of which I would rotate between the living room and window sill daily, and the other two would rain static in their locations for the entire duration of the experiment. I would treat and care for all plants in an identical manner, ensure that their respective locations remained precisely the same, as well as measure and record the growth of each plant daily. After a sufficient period of time had elapsed, I would record the final relevant data in Excel, and insert a line graph with all four plants incorporated into a single chart, which would also demonstrate the growth rate over time. Subsequently, based on the information contained within the data points, and the line graph comparison, I would draw a final conclusion and present my data to interested parties in the form of brief Microsoft PowerPoint presentation. I would include a brief summary of the intent of the experiment, a detailed explanation of the tools and exact process in which I used to conduct my test, and all the raw data statistics relative to the daily growth rate of all four plants.
Dependent Variable – The location of the plants
Independent Variable – The growth rate of the plants
Control – The 2 static plants
The bank teller with brown hair and brown eyes is taller than the other tellers. NOT TESTABLE
When Sally eats healthy foods and exercises regularly, her blood pressure is 10 points lower than when she eats fatty foods and does not exercise. TESTABLEHypothesis – Sally’s Blood pressure will be lower when she eats healthy.
Null Hypothesis – The fact that Sally eats healthy foods and exercises regularly will have no effect of Sally’s blood pressure.
Experimental Approach – I would first observe and record, for sufficient period of time, Sally’s eating habits, exercise regimen, and blood pressure, when she is not eating as healthy or exercising as regularly to accurately gauge a reliable average of the range of her blood pressure in this phase of the experiment. Then, I would ensure that Sally was placed on healthy eating plan, approved by a nutritionist, and prescribe and exercise routine. Sally’s eating habits and exercise regiment would again be recorded daily, along with her blood pressure statistics and other relevant information. I would tract and record the daily relevant statistics in Excel, and I would also use a line graph to illustrate the comparison of her blood pressure over time under the tow different scenarios. Subsequently, based on the information contained within the data points, and the line graph comparison, I would draw final conclusion and present my data to interested parties in the form of a brief Microsoft PowerPoint presentation. I would include a brief summary of the intent of the experiment, a detailed explanation of the tools and exact process in which I used to conduct my test, and all the raw data statistics relative to the changes in Sally’s blood pressure as will as her diet and exercises habits throughout the experiment process.
Dependent Variable – Sally’s eating and exercise plan.
Independent Variable – Sally’s blood pressure reduction.
Control – The phase of the experiment when Sally’s blood pressure is observed and recorded when she is not eating healthy or exercising regularly.
The Italian restaurant across the street closes at 9 pm, but the one two blocks away closes at 10 pm. NOT TESTABLE
For the past two days, the clouds have come out at 3 pm, and it has started raining at 3:15 pm. NOT TESTABLE
George did not sleep at all the night following the start of Daylight Savings Time. NOT TESTABLE