Research Design
what are the four scales of measurement?
nominal,ordinal,inteval,ratio
taking the maximum number minus the minimum number of a data set gets what?
range
postive, negative, none
what is the mean of a z score distribution?
0
A design wherein the IV is manipulated by the researcher is what type of design?
Experimental
the most frequent occurring number in a set is what
mode
if my correlation is r=-.6 what is the direction and strength of the relationship?
negative strong
probability ranges from what to what?
0-.1
means and standard deviations are examples of what?
descriptive statstics
if the mean, median, and mode are all equal what shape is the distribution?
bell/normal
if my scp or ssxy is + what type of correlation will I have?
positive
how much area is under the curve?
100% or .1
if the results of a study can be generalized to other settings, people, etc it has good what?
external validity
if the variance of a data set is 25 what is the sd?
5
correlation ______causation
does not equal
a z-score of -2.3 tells us what?
score is 2.3 standard deviations below the mean
what type of sampling is best to show cause and effect?
random
when we set up our data into the columns what does the last column help us find?
sum of squares
ssxy or scp /ssx is what
slope
if my score is 85 and the mean is 80 with sd of 5 what is my z-score?
1