Ana was interested in the relationship between funding sources for nutritional researches and the conclusions of those researches. She gathered information on all researches concerning soft drinks that were published between 11 January, 1999 and 31 December, 2003, and compared the source of their funding with the results of the research. What type of a statistical study did Ana use?

Ana used an observational study, and there is a correlation between the source of funding and the conclusions of soft drink researches.

Explanation:

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1. protective factors are characteristics associated with a lower likelihood of negative outcomes or that reduce a risk factor's impact. individual-level protective factors might include positive self-image, self-control, or social competence

2. attitudes are the response that is a result of our values. values decide what we think as for right, wrong, good, or unjust. attitudes are our likes and dislike towards things, people, and objects. they represent several beliefs focused on a specific object or situation