Sandra conducted an observational study to learn how relationships with family affect happiness. she surveyed 500 people in her hometown and found that 85% say that positive relationships with family members make them happy. what conclusion can sandra draw from her study?

she can only conclude that there may be a link between closeness with family and happiness

Explanation:

From the description, Sandra is conducting an observational study, not particularly an experiment. Since she never really take into account all possible variables that can influence the relationship , all she can do is link family closeness with happiness (but she can really ensure that both of these have causal-effect relationship.

answer; the candidate for vice president;

answer; randomization;