Hi TeachBerk,
in passage III, question 65, the questions asks how to calculate the number of observed heads.
chance error is defined as = (heads expected) - (heads observed); and it could be positive or negative.
If we flip a coin 1000 times, then we would expect 500 heads.
Suppose chance error = +30, then we expected 30 more heads than we actually observed.
So the number of heads observed = 500 - 30 = 470.
Thus, choice B is the correct answer, not choice D.
Please correct me if I'm wrong.
in passage III, question 65, the questions asks how to calculate the number of observed heads.
chance error is defined as = (heads expected) - (heads observed); and it could be positive or negative.
If we flip a coin 1000 times, then we would expect 500 heads.
Suppose chance error = +30, then we expected 30 more heads than we actually observed.
So the number of heads observed = 500 - 30 = 470.
Thus, choice B is the correct answer, not choice D.
Please correct me if I'm wrong.
