Author Question: In an MDS routine, for n objects, _______________ possible pair-wise comparisons are used to ... (Read 89 times)

ghost! · **on:** Jun 29, 2018

In an MDS routine, for n objects, _______________ possible pair-wise comparisons are used to estimate 2n coordinates in two-dimensional space.
a. n(n1)/2 c. n
b. n21 d. cannot be determined

Question 2

Discuss the common procedures for testing association for data that are nominal, ordinal, and interval/ratio.

jackie · **Reply #1 on:** Jun 29, 2018

Answer to Question 1

A
For n objects, n(n1)/2 possible pair-wise comparisons are used to estimate 2n coordinates in 2-D space.

Answer to Question 2

For nominal data, the statistical choice is cross-tabulation with 2 test. For ordinal data, the statistical choice is the Spearman rank correlation or cross-tabulation with 2 test. For interval/ratio data, the statistical choice is Pearson's r or simple regression.