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Significant variables are the variables whose change will alter or affect the outcome of the experiment. Variables that are not significant may also alter the outcome, but this change is a statistical error, not a systematic change. For example if you are trying to estimate how much food will be consumed in an event, a variable is how many people will attend the event and another is how tall are the people that attend it. The first variable is significant, whereas the latter isn't.
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Which three variables does the author recognize as being especially significant in determining one's social class?
wealth power and prestige
Does qualitative research not control variables?
Qualitative research does control some variables. Mediating variables are the type that researchers can intervene with during a quantitative study.
What is correlational survey?
A correlational survey or study determines if two or more variables are correlated. It helps you determine the specific relationship between the variables.
When is the correlation coefficient zero?
when there is no relation between the variables
What are the three demographic variables?
fertility, mortality, and migration
What was significant about the organisms Darwin observed on the Galapagos Islands?
because he discovers the differences between the variables of finches
When is there no trend line for a scatter plot?
When no possible relationship between the two variables in question is statistically significant.
Why is density expressed in two significant figures?
Because density expressed in two significant figures depends on your accuracy of your measurements of mass and volume to calculate as well as any variables that you are expected to use.
The causes of muticolinearity in multiple regression?
There is multicollinearity in regression when the variables are highly correlated to each other. For example, if you have seven variables and three of them have high correlation, then you can just use one them in your dependent variable rather than using all three of them at the same time. Including multicollinear variables will give you a misleading result since it will inflate your mean square error making your F-value significant, even though it may not be significant.
Mary somerville's most significant contributions to the field of mathematics?
Mary Somerville was a Scottish mathematician and astronomer. She contributed many things to the mathematic world, but her invention of the commonly used variables for algebraic math is the most significant.
Which three variables does the author recognize as being especially significant in determining one's social class?
wealth power and prestige
How many variables are tested during an experiment?
There are three types of variables tested: manipulated variables, controlled variables, and experimental variables.
What is the meaning of declare value?
When forming a hypothesis for quantitative research, a declarative hypothesis states the expected relation between variables, whereas a null hypothesis states that there is no significant relation.
What is the differecnce between independent variables and dependent variables?
Every time the independent variables change, the dependent variables change.Dependent variables cannot change if the independent variables didn't change.
What are variables that do not change in an experiment?
Variables that do not change in an experiment are independent variables.
The variables that do not change in an experiment are what?
Variables that do not change in an experiment are independent variables.
What are the three variables that play an important role in a Practical Investigation?
Independent Variables, Dependent Variables and Extraneous Variables.
