Question

In a memory test, the test subjects are shown 600 objects and are asked after two hours to name the objects. The historical records show that test subjects remember

60% of the objects after two hours.

1. Find the mean of p
   , where p is the proportion of objects that are remembered by a test subject.
2. Find the standard deviation of p
   .
3. Compute an approximation for P<p0.59, which is the probability that fewer than 59%
   of the objects are remembered by a test subject. Round your answer to four decimal places.

Answer 1