pp2.html

Probability Problems

Given ND Mu = 30 SD= 5

1.  What is C5?   C25?   C50?  C80?

2.  a.  P(Score between 25 and 35) = ?

    b.  P(Score between 30 and 40) = ?

    c.  P(Score between 29 and 31) = ?

    d.  P(Score between 20 and 30) = ?

3. What percent of the distribution deviates from 26 by more than two score
points? More than four score points? Less than two score points?

4.  a.  P(X LE X1) = .05

    b.  P(X LE X1) = .95

    c.  P(X LE X1) = .50    What is the value of X1?

    d.  P(X GE X1) = .05

    e.  P(X GE X1) = .95

5.  a.  P(X GE 30) = ?

    b.  P(X GE 20) = ?

    c.  P(X LE 30) = ?

    d.  P(X LE 40) = ?

6.  a.  P(|x| LE x1) = .95       Determine x1.

    b.  P(|x| GE x1) = .05