Question: B4. Now focus on missing data for the variable higrade, using the same frequency distribution output as in Exercise B3. Answer these questions: (a) How
B4. Now focus on missing data for the variable higrade, using the same frequency distribution output as in Exercise B3.
Answer these questions:
(a) How many cases altogether had valid information, and what percentage of the overall sample did these cases represent?
(b) How many different types of missing values were there?
(c) What were the missing value codes (available by looking at the Variable View screen of the Data Editor, or in the Codebook)?
(d) What do these missing values codes mean?
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