Discrete random variable, joint probability distribution, independence, covariance.

[STEP III 2017 Question 12 (Probability and Statistics)]

Expectation, ordering of letters, sum, variance.

[STEP III 2013 Question 12 (Probability and Statistics)]

Expectation, median, gaussian, variance.

[STEP I 2005 Question 14 (Probability and Statistics)]

Variance, covariance, binomial distribution, RSS.

[STEP III 2002 Question 14 (Probability and Statistics)]

Roots of quadratic, expectation, cubic equation.

[STEP I 2002 Question 13 (Probability and Statistics)]

Increasing function, solution of equation, expectation.

[STEP III 1999 Question 12 (Probability and Statistics)]

Expectation and variance, Penny Black stamp.

[STEP I 1996 Question 13 (Probability and Statistics)]

Joint probability distribution, marginal probability, expectation.

[STEP III 1991 Question 16 (Probability and Statistics)]

Expectation, probability, long time.

[STEP I 1989 Question 16 (Probability and Statistics)]

Expectation and variance, integer values.

[STEP I Specimen Question 15 (Probability and Statistics)]