Z-scores
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8 Terms
Z score formula
score - mean of scores / standard deviation
Z scores that are the same distance from…
0 have the same chance of occurring
Probability of several shaded areas =
sum of probability of the shaded areas
Probability of nonshaded areas =
1 - probability of shaded areas
Given the Z score for a particular score X
the z-scores table gives the proportion of the population of scores that are larger than score X
Setting probable limits (confidence intervals)
Identify the limits in which we have a specified level of confidence that a randomly selected score in the distribution will fall within a specified range
Dealing with outliers
check original data
remove from dataset
change the score
Dealing with outliers: change the score:
Replace with next highest score plus one, replace with mean plus/minus 2 X SD (only if it remains the highest/the lowest score)
Note 
Flashcards (22)