What percentage of students scored between 81 and 89?
Only 5% of the students taking the test scored higher than what grade?
A manufacturer of personal computers sets tests competing brands and finds that the
amounts of energy they require are normally distributed with a mean of 285 kwh and a
standard deviation of 9.1 kwh.
If the lowest 25% and the highest 30% are not included in a second round of tests, what
are the upper and lower limits for the energy amounts of the remaining sets?
Use the following information to answer questions 128-132:
While conducting experiments, a marine biologist selects water depths from a uniformly
distributed collection that vary between 2.00 m and 7.00 m.
What is the probability that a randomly selected depth is less than 3.60 m?