Matilda has about 6 missing cases on her index of voting interest out of 1500 respondents. The best strategy for handling these missing case would be to:

The best strategy is to exclude the 6 missing cases from the computation and analysis of the index.

Step-by-step explanation:

Generally, indexing is commonly used as a statistical tool for grouping specific segments or sets of data. In this case, Matilda is trying to conduct the indexing of the voting interests of about 1500 respondents. However, she discovered that there are 6 missing cases on her index of voting interest. In order to ensure effective analysis, it is paramount to separate missing cases from the other respondents. Therefore, the best strategy is to exclude the 6 missing cases from the computation and analysis of the index.