Could someone pleasee help me in Algebra 1?
Which one of these statistics is unaffected by outliers?
C. Standard deviation
D. Interquartile range
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Do you know the definition of an outlier?
Then you need to look that up in order to answer the question.
Not the answer you are looking for? Search for more explanations.
something that lies outside the main body or group that it is a part of
Good so now, look at each answer above an ask yourself whether an outlier would affect it.
You will need to know how each of the answers a) b) c) and d) are defined and calculated
I was thinking A but im not sure
an outlier is a data point that's far away from the other data. It has to be 1.5 times the IQR away from the nearest data point. Like if the test scores of a class were 10, 75, 76, 81, and 90, the 10 is an obvious outlier.
So outliers affect the range and mean for sure
standard deviation is a measure of how far the data points are away from the mean, so a large or small outlier can screw with it
@peachpi could you help me with another question?
Take a look at the following set of data: 54, 62, 57, 60, 58, 54, 133.
What word describes the data point 133?
ok, so look at the last question. What's a data point that's far away from all the others?
they're asking you about 133.
All the other numbers are in the 50s and 60s.
That means 133 is far away from everything else.
What's that called?