1.1 Quick revision

Consider this RQ (based on Jaworowska et al. (2012)):

For London take-away restaurants, is the average amount of salt in a Chinese meal the same as in an Indian meal?

What type of RQ is this? Descriptive, relational, repeated-measures or correlational? Explain.
What is the purpose this RQ? Estimation or decision-making? Explain.
Is an intervention present? If so, what is it?
What is the outcome in this RQ? Explain.
What is the response variable?
What is the unit of analysis? Explain.
What is the unit of observation? Explain.
The article states (p. 518) that "a takeaway meal was defined as food purchased from out of home food outlets or ordered for home delivery". What type of definition is this?

References

Jaworowska A, Blackham T, Stevenson L, Davies IG. Determination of salt content in hot takeaway meals in the United Kingdom. Appetite. 2012;59(2):517–22.