In this ·experiment the immediate objective was to find the effects of changes on the amount of unburned carbons in engine exhaust gas. The following results were obtained:
![216_amount of unburned carbons in engine.png](https://secure.tutorsglobe.com/CMSImages/216_amount of unburned carbons in engine.png)
Stating any assumptions analyze these data. What do you conclude? It was hoped to develop an engine giving lower levels of unburned carbon. Write a report asking appropriate questions and making tentative suggestions for further work.