Statistics Flashcards
(28 cards)
What is a central tendency?
a way to describe the center of a data set
ex-includes mean,median, and mode
What is a Mean?
the average of all numbers
What is the Median?
the middle number in a list
What is the Mode?
The number that appears most often
What is Bimodal?
A data set with two modes- (peaks)
What does it mean for a graph to be positively skewed?
a distribution with a long tail on the right (higher values)
What does it mean for a graph to be a negatively skewed?
A distribution with a long tail on the left (lower values)
What is a range?
Different between the highest and lowest values
What is Variance?
A measure of how spread out the numbers are?
What is standard deviation?
How much scores vary around the mean (average spread)
What is a normal curve?
A bell-shaped curve showing a normal distribution
What is is a percentile?
Tells you how a score compares to others (e.g., 90th percentile=better than 90%)
What is a Correlation?
A relationship between two variables?
What is Correlation coefficient?
a number (-1 to +1) showing how strong and what direction the relationship is
What does it mean for something to be statistically significant?
Results are likely not due to chance
What is a Scatter plot?
A graph showing the relationship between two variables
What is effect size?
Shows how strong a result or difference is
What is a replication?
Repeating a study to see if you will get the same results
What is Meta-Analysis?
Combining results from many studies to find overall trends
What is Peer review?
Other experts check the quality of a study before it’s published
What is no coercion?
Participants must not be forced to join the study
What is informed consent?
Participants agree to take part after knowing what it involves
What is Deception?
Misleading participants, but only if necessary and ethical.
What is informed assent?
A child’s agreement to participate, with parent/ guardian permission
