OCR MEI Further Statistics B AS Specimen — Question 2

Exam BoardOCR MEI
ModuleFurther Statistics B AS (Further Statistics B AS)
SessionSpecimen
TopicCumulative distribution functions
TypeCalculate probabilities from CDF

2 The cumulative distribution function of the continuous random variable, \(Y\), is given below. $$\mathrm { F } ( y ) = \left\{ \begin{array} { c c } 0 & y < 0
\frac { y ^ { 3 } - y ^ { 2 } } { 4 } & 1 \leq y \leq 2
1 & y > 2 \end{array} \right.$$
  1. Find \(\mathrm { P } ( Y \leq 1.5 )\)
  2. Verify that the median of \(Y\) lies between 1.6 and 1.7.
  3. Find the probability density function of \(Y\).