Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability and its Z score.
Z = (score-mean)/SD
Insert the data into the equation to calculate the score (response).
In a recent study on world happiness, participants were asked to evaluate their current lives on a scale of 0 to 10, where 0 represents the worst possible life and 10 represents the best possible life. The mean response was 5.9 with a standard deviation of 2.6.
a. what response represents the 88th percentile?
b. what response represents the 60th percentile?
c. what response represents the first quartile?
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