Phonetics and the IPA 9, Exercise 3: comparing with the averages

There is no single correct answer, because it depends on your voice.

What to expect:
  - The pattern should match: [i] low F1 and high F2; [a] high F1; [u] low
    F1 and low F2.
  - The numbers will differ from the table (240/2400, 850/1610, 250/595).
    The table gives averages for a male voice (Wikipedia, "Formant").
    A shorter vocal tract gives higher values, so a female or child voice
    would usually show higher formants for the same vowel (this
    relationship is my general knowledge, not from the source).
  - Differences can also come from your accent, from how far you held the
    vowel, and from how Praat's formant tracker is set (the source says
    formants are estimated, e.g. by LPC).

Check: the ORDER of the values matters more than the exact figures.