Question

Refer to the previous exercise.
a. Find the z -score corresponding to the lower quartile (Q1) of a normal distribution.
b. Find and interpret the lower quartile and upper quartile of the MDI.
c. Find the inter-quartile range (IQR) of MDI scores.
d. Section 2.5 defined an observation to be a potential outlier if it is more than 1.5 × IQR below Q1 or above Q3. Find the intervals of MDI scores that would be considered potential outliers.


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  • CreatedSeptember 11, 2015
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