A positive z score must always yield a percentile which is

The story of Helen Keller includes an anecdote wherein she

states that she recalls having no awareness of her own thought processes prior to acquiring some language skills. The linguistic determinism model suggests that this supports the theory that all thinking is represented linguistically, but other explanations of Keller's remembrance (or lack thereof) posits that most people have poor (or even absent) memories from their early years. This demonstrates which principle of critical thinking? A) Ruling out rival hypotheses B) Extraordinary claims C) Falsifiability D) Correlation vs. causation

Children experience a somewhat higher rate of illness during the first two years of elementary school than later, because of

A) exposure to sick children and a immune system that is still developing. B) a lack of immunizations required for school entry. C) poor hygiene and a lack of preventative measures in schools. D) increased contact with unfamiliar foods in school lunches.