Solution
= Solution
\b[Yes, the data are centred.] Both coordinate <sample means> vanish:
$$
\bar x=\frac{7-8+1}{3}=0,\qquad
\bar y=\frac{1+6-7}{3}=0.
$$
Thus <principal component analysis> can be applied without further <data centering>.
= Solution
\b[Yes, the data are centred.] Both coordinate <sample means> vanish:
$$
\bar x=\frac{7-8+1}{3}=0,\qquad
\bar y=\frac{1+6-7}{3}=0.
$$
Thus <principal component analysis> can be applied without further <data centering>.