Vocabulary
The two branches of statistics
What are descriptive and inferential statistics?
Qualitative data only Categorized using names, labels, or qualities No mathematical computations can be made
What is categorical Data?
Occurs when an experimenter cannot tell the difference between the effects of different factors on a variable that are outside the scope of the experiment or study
What are Confounding Variables?
Quantitative data that has limited level of precision
What is discrete Data?
Occurs when people answer a survey a certain way that they think will make others think well of them
What is social desireability bias?
Type of hypothesis test one can do using categorical data
What is 1 proportion z test?
The value below which 25% of the data will lie
What is Q1 or the first quartile?
A range of values surrounding the sample mean within which one can be reasonably certain the population mean resides.
What is a confidence interval?
These types of data take on numerical values for which the experimenter can decide the level of precision at which to measure.
What is a continuous quantitative variable?
A data value that has 90 percent of the other values below it.
What is 90th percentile?
Type of sampling which avoids sources of bias
What is Randomization?
Uses quartiles, median and minimum and maximum values to make this graph.
What is a box plot?
The type of hypothesis test that one conducts when the population standard deviation for the quantitative data is unknown
What is a t test?
A controlled treatment is applied to part of a sample and is compared to a part of the sample that does not receive the treatment and responses are observed
What is an Experiment?
Occurs when people choose to be part of a study.
What is voluntary response bias?