Z = (score-mean)?SD
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to that Z score.
A physical fitness association is including the mile run in its secondary-school fitness test. The time for this event for boys in secondary school is known to possess a normal distribution with a mean of 440 seconds and a standard deviation of 60 seconds. Find the probability that a randomly selected boy in secondary school can run the mile in less than 302 seconds.
A) 0.5107
B) 0.0107
C) 0.9893
D) 0.4893
3 answers
Z = (score-mean)/SD
.0107
1 answer