Sampling
What is sampling error?
The degree to which a sample's characteristics differ from the population.
Which variable gets manipulated in an experiment?
What is a mode?
The most common data point
What is SD mean?
Standard Deviation
What is a cross-sectional dataset?
Data taken at a single point in time.
Which type of sample can you not calculate sampling error for?
non-probability sample
What is a confound?
Having multiple changes in an experiment, meaning that changes in the DV could be attributed to changes outside of the IV. A third conflicting variable.
What is a median?
The mid point of the dataset
What is the name of the software we used in homework 5?
SPSS
What is a confidence interval?
The range of values where the true population is likely to be
What type of sample is a simple random sample?
Probability sample
Why do we conduct experiments?
To determine casuality
How do you calculate the mean?
The average of all data points
What is the set confidence interval level for the purposes of our class?
95%
What does statistical control allow researchers to do?
Ensure that only the IV is manipulated and that it is properly manipulated.
What is an example of a convenience sample?
college students are the most common (will accept other answers)
In simple experiments there are two groups of participants, what are they called?
Treatment and control
When would you use the median as compared to the mean?
When the dataset has a positive or negative skew.
What level of Cronbach's alpha reliability is considered to be be acceptable?
What two pieces of data do you need to determine a confidence interval?
The mean and the standard deviation
No
In experiments utilizing random assignment, does it matter if there are confounding variables? Explain your answer.
No, random assignment controls for all conflicting variables in a data set. For example, random assignment would indicate that everything is held equal amongst data sets.
When is the mode the most acceptable statistic to use?
Calculate the standard deviation from the following information. Mean=17, SD=?, Variance=4, Mode=16, Median=16.7
SD= 2
The generalizability of the findings to other populations