Here are 10 test scores: 73, 74, 76, 77, 78, 79, 80, 80, 82, 84. The mean of these scores is 78.3.

Does this set have an outlier and, if so, how does removing it affect the mean?

A.
The set has 73 as an outlier and removing it increases the mean by about 0.5.

B.

This data set has no outliers.

C.
The set has 73 as an outlier and removing it decreases the mean by about 10.

D.
The set has 73 as an outlier and removing it decreases the mean by about 0.5.

Question

Here are 10 test scores: 73, 74, 76, 77, 78, 79, 80, 80, 82, 84. The mean of these scores is 78.3. 

 

Does this set have an outlier and, if so, how does removing it affect the mean?
	
	
 
A.
	The set has 73 as an outlier and removing it increases the mean by about 0.5.
	
 
B.
	

This data set has no outliers.
	
 
C.
	The set has 73 as an outlier and removing it decreases the mean by about 10.
	
 
D.
	The set has 73 as an outlier and removing it decreases the mean by about 0.5.

anonymous · Answer

@Nixy and @pooja195

lynfran · Answer

An outlier is a value in a data set that is very different from the other values. That is, outliers are values unusually far from the middle. In most cases, outliers have influence on mean , but not on the median , or mode.

anonymous · Answer

so B

lynfran · Answer

well looking at the definition i think its B too

anonymous · Answer

No the set does not have any outliers and the answer is B. I concur.