Dr. J's Maths.com
Where the techniques of Maths
are explained in simple terms.

Cumulative distribution functions.
Test Yourself 1 - Solutions.


 

Determining a cumulative distribution function.

1. (i)

(ii)

(iii)

  2.
  3.
 

4. (i)

(ii)

(iii)

  5.
  6.
  7.
Determining a probability. 8.
  9. Drop bears
 

10.

 

11.

 
  12.
Medians and other percentile points. 13.
  14. (i)

(ii) To find the cumulative function, integrate the demnsity function (which we just did) and use the limits 0 and x.

(iii) For the interquartile range, we calculate Q1 and Q3 - which have 25% and 75% of the area to the left: