0.7 Statistical Reasoning
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13 Terms
Longitudal
A study taking place over a long period of time
Cross sectional
a study comparing at least two groups during the same time period
median
the middle number after all numbers are sorted from lowest to highest
mode
most frequently occuring score (bimodalism can occur)
mean
sum of scores divided by number of scores (average)
range
a gap between the highest and lowest (highest minus the lowest)
standard deviation
how much scores vary around the mean
skewed
lopsided by a few outlier scores
normal distribution
a symmetrical bell-shaped distribution
normal curve
bell curve
inferential statistics
determine how reliable a difference in a research sample is
statistical significance
a result that is unlikely to happen by chance/coincidence alone
percentile rank
the location of a score within a group of scores