Correlation questions add how to do them

Question 1

)  The scientists estimated the mean mass of fibre eaten per day using a food frequency questionnaire (FFQ).

The FFQ asks each person how often they have eaten many types of food over the past year.

An alternative method to calculate fibre eaten is for a nurse to ask each person detailed questions about what they have eaten in the last 24 hours.

Suggest one advantage of using the FFQ method and one disadvantage of using the FFQ method compared with the alternative method.

Answer 1

(Advantage)

1.   Over longer period so more representative

OR

Diet over 24 hr may not be representative

Relies on (long term) memory so may not be accurate

OR

Recall of 24 hr diet likely to be more accurate