Question

A) Calculate the correlation for the following sample using the z-scores

ZX	ZY
1.47	0.26
0.94	0.61
0.58	-0.26
-0.58	1.72
-0.94	-0.61
-1.47	-1.72

B) Determine if there are any outliers in the following dataset
98 92 95 87 70 96 90 65 92 95 93 98 115

Answer 1

Here is the R software output

Correlation is 0.4291.

from the above plot, we conclude that there are 3 outlier present in the given data. Namely 65,70,115 are outliers.

And here is the excel output

in the above image

Correlation = 0.4291

And 70,65,115 are outliers in the second example.