Variables & Distribution
Level of Measurement
Hypotheses & Sampling
Peer Questions!
Surprise Me!
100
Variables that can only take on a finite (limited) number of attributes.
What are discrete variables?
100
The following question is what level of measurement: “Did you go grocery shopping last week?”
What is nominal?
100
Demonstrates that there will be no relationship between variables
What is the null hypothesis?
100
When you have 2 equally occurring attributes
What is a bimodal distribution?
100
These are the four ways in which we can measure variability.
What are range, interquartile range, variance, and standard deviation?
200
Variable that are coded as 0 and 1 to indicate whether the attribute exists or not in the dataset is called what?
What is a Dummy variable?
200
This is the primary difference between interval and ratio variables.
What is a real zero in a ratio variable.
200
Erroneously conclude there is no relationship between two variable when there really is one.
What is a type 2 error?
200
Specifying how to measure the variables we conceptualized
What is operationalization?
200
Another term regarding the strength of the relationship between the two variables (and, more specifically, the influence of the IV on the DV).
What is effect size?
300
A distribution with a long tail to the left, and a high peak toward the right of the graph is considered what?
What is a leptokurtic, negative distribution?
300
The level of a measurement directly determines this in research.
What is the appropriate statistical analysis?
300
These are 3 types of measurement bias.
What is Acquiesent, Social Desirability, Cultural Bias
300
1.28, 1.65, 2.32
What are the critical values for 90% 95% and 99% in one tail hypothesis?
300
When we determine a range into which we would estimate a population to fall based on a sample statistic we are finding the __________________.
What is the confidence interval?
400
The sampling distribution of the means of an infinite number of samples would reflect a normal curve because of this.
What is the central limit theorem?
400
GRE scores are an example of this level of measurement.
What is interval?
400
This is an example of what: There is a difference in the number of trips that Baylor students from Texas and Baylor students from out of state take.
What is a two-tail hypothesis?
400
“Oh, how do you want me to respond, oh wonderful researcher?”
What is social desirability bias?
400
Identify this formula: SD of population / sq. rt. of sample size
What is the standard error of the mean?
500
This type of analysis examines the relationship between 2 variables.
What is a bivariate analysis?
500
This level of measurement is primarily categorical, but may occasionally be considered continuous in data analysis.
What is ordinal?
500
Refers to a portion of the standard normal curve distribution that is determined by our alpha.
What is the rejection region?
500
Tendency of all samples (especially smaller ones) to differ from the populations from which they were drawn.
What is sampling error?
500
1.64 is the critical value for what one-tail test and for what two-tail test alpha size?
What is a=.10 (two-tailed), and a=.05 (one-tailed)?
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