Question

Could someone pleasee help me in Algebra 1?

Which one of these statistics is unaffected by outliers?
A. Range
B. Mean
C. Standard deviation
D. Interquartile range

Answer 1

Do you know the definition of an outlier?

Answer 2

no

Answer 3

Then you need to look that up in order to answer the question.

Answer 4

something that lies outside the main body or group that it is a part of

Answer 5

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

Answer 6

I was thinking A but im not sure

Answer 7

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

Answer 8

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

Answer 9

so C?

Answer 10

yep

Answer 11

thank you

Answer 12

yw

Answer 13

@peachpi could you help me with another question?

Answer 14

ok

Answer 15

Take a look at the following set of data: 54, 62, 57, 60, 58, 54, 133.
What word describes the data point 133?
A. outsider
B. median
C. outlier
D. range

Answer 16

ok, so look at the last question. What's a data point that's far away from all the others?

Answer 17

54

Answer 18

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?

Answer 19

C?

Answer 20

yes

Answer 21

okay thanks!

Answer 22

you're welcome