Statistics Question, urgent help please!

Question

1. By looking at this scatter plot, are there any outliers? Explain please, thank you.
2. In detail, describe the correlation. (whether there are issues, the trend wise, etc.)
3. Where is the hidden variable?
4. Does this correlation have a cause and effect relationship? If not, what type of relationship is this? Explain in detail.
5. What does the equation of the line tell us about the graph?

Answer 1

I would first make a table to represent each one of the years' values based off the scatter plot graph.

The min value is 5 and the max value is 8 and it looks like most of the points with respect to year is around 6 or 7. So really the only outliers here would be 5 or 8 potentially but those are not really outliers since they are part of the yearly trends.

Every 6 years interval here it is 2000-2006 and 2006-2012 , there is a positive slope (increase) in the each respective years in the given intervals 2000-2006 and 2006-2012.

Yes definitely there is a hidden variable since there is a legitimate reset of value at year 2006

The equation of the line tells us there is a positive slope from 2000-2006 and another positive slope from 2006-2012 . The only area of concern is what happens in 2006?? It jumps down from almost a value of 7 (like 6.9) down to a value of 5 which has a negative slope not shown since it is a year to year scatter plot.