What kind of research is Saanvi conducting if she tracks six groups of participants, each group a different age, over several years, assessing them on her variable of interest once every six months?

The type of survey Saanvi is conducting, it follows six groups of participants, each group at a different age, over several years, evaluating them on their variable of interest once every six months, he is doing a descriptive Statistics of a certain group of people, to know more

Variable is the characteristic of interest that is measured in each element of the sample or population. As the name says, their values vary from element to element. Variables can have numeric or non-numeric values.

Quantitative Variables: these are characteristics that can be measured on a quantitative scale, that is, they have numerical values that make sense. They can be continuous or discrete.

Qualitative (or categorical) variables: these are characteristics that do not have quantitative values, but, on the contrary, are defined by many categories, that is, they represent a classification of individuals. They can be nominal or ordinal.

With this information, we can conclude that the type of survey carried out by Saanvi is the survey of Descriptive Statistics of a group of people.

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longitudinal research

Explanation:

With regards to the information that have been given in the question, the kind of research that Saanvi is conducting is referred to as longitudinal research.

Longitudinal research is simply referred to as a form of correlational research whereby the variables involved are being looked into and assessed over a certain period which can be in weeks, in months, as well as years.

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i think it's the first one because doctors aren't the ones who get rid of the old needles. most of them time it's not even doctors who give you shots, it's nurses.