1.2 Experimental Design
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Q: What is an Independent variable?
A: The variable that is manipulated.
Q: What is a Dependent variable?
A: The variable that is measured.
Q:What is the Experimental group?
A:The group that is receiving the experiment or independent variable.
Q: What is a Control Group?
A: Standard to which the comparisons are made in an experiment.
Q:What is standard deviation?
A: A measure used to quantify the amount of variation in a set of data.
Q:Which graph axis independent and dependent variables would go on?
A: x-axis and y-axis
Q: How do you interpret standard deviation?
A: Standard deviation is used to measure confidence in statistical conclusions. If error bars overlap the difference is not statistically significant. If there is less overlap
Q: What is 95% Cl error bars?
A: A range of values you can be 95% confident contains the true mean. p=0.1.
Q: What is the standard deviation of the students’ test scores 85,89,72,65, and 94?
A:10.87
Q: (Apply 4 terms) If a plant receives a cup of special fertilizer then it will grow larger than a plant that doesn’t receive the fertilizer.
A: Independent: plant with fertilizer Dependent: Plant size Control: Environment, water amount Experimental: Plant with fertilizer vs plant without
Q: What is the relationship between independent and dependent variables?
A: If the independent variable <(increases/decreases)> then the dependent variable <(increase/decreases)>.