Explore your dataset using the descriptive statistics techniques on variables studied in this database.

INSTRUCTIONS TO CANDIDATES

ANSWER ALL QUESTIONS

1. Explore your dataset using the descriptive statistics techniques on variables studied in this database.

2. Descriptive statistics on repair costs and repair time by other factors presented in the database.

3. Can we validate the statement that the duration of repair varies according to the type of repair. What conclusion do you draw from this?

4. Can we say that the average repair costs are higher for electrical repairs than mechanical ones?

5. Does the repair time vary depending on the type of repair? If so, how can such a relationship be confirmed? 6. Is there a link between the repairer and the type of repair? Comment on your results. 7. What might we find by exploring the impact of repair time, repairer, and the number of the months since the last intervention on the repair costs? Which data analysis technique would best describe such a relationship? What do the results of the analysis indicate about this relationship? What suggestions would you make to improve the quality of the estimation? Discuss the usefulness of other variables that can be added to the equation?

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