Sandi believes that people who eat at mcdonald's are overweight, so she decides to do a naturalistic observation of people who eat at mcdonald's. what should most concern us about sandi's observations? (2 points) the observer effect the bystander effect observer bias subject bias

observer bias

Explanation:

Based on the information provided within the question the thing that should concern us the most about Sandi's observations is Observer Bias. This term refers to the tendency of a researcher to see what they want as opposed to what is actually happening. This can be said because of Sandi's belief that McDonald clients are all overweight, by having this belief before actually having come to this conclusion with a series of tests, it might lead her to believe this to be true regardless of what she observes during the experiment.

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small = small current large mag large current

distance = 150m

displ = root (50 ^2 + 100^2)

root(2500+10000)

root 125000