Explain why zip codes should be considered text variables rather than numeric.

True or false: All things being equal, more information is almost always better.

Explain why it is not recommended, as a strategy for dealing with missing data, to simply omit the records or fields with missing values from the analysis.

Which of the four methods for handling missing data would tend to lead to an underestimate of the spread (e.g., standard deviation) of the variable? What are some benefits to this method?

What are some of the benefits and drawbacks for the method for handling missing data that chooses values at random from the variable distribution?

Of the four methods for handling missing data, which method is preferred?

Make up a data set, consisting of the heights and weights of six children, in which one of the children is an outlier with respect to one of the variables, but not the other. Then alter this data set so that the child is an outlier with respect to both variables.