# Correlation Formule (Statistics Aps Jhelum)

**Topics:**Normal distribution, Probability theory, Probability density function

**Pages:**8 (1530 words)

**Published:**May 17, 2013

Paper: Statistics Pre- Board 2012(Objective) Marks: 18Time: 30 min

Name: ………………………………………………………………………… Section: …………………

SECTION-A (18 Marks)

| |Select the correct answer. Cutting or over writing is not allowed. | | | |If in a table all possible values of a random variable are given with their corresponding probabilities, then its table is called as | | | |(a) Prob. Density function (b) Dist. function (c) Prob. Distribution (d) Continuous dist. | | | |A variable that can assume all possible values between two points is called.. | | | |(a) Discrete variable (b) Random variable | | | |(c) Continuous random variable (d) discrete sample space | | | |A formula or equation used to represent the probability distribution of a continuous random variable .. | | | |(a) Prob. Density function (b) Dist. function (c) Prob. Distribution (d) Continuous dist. | | | |If X is random variable and f(X) is the probability of X then the expected value of this random variable is equal to: | | | |(a)(f(X) (b) ([X+ f(X)] (c) (f(X) + X (d) (Xf(X) | | | |Which of the following is not possible in probability distribution | | | |(a) P(X) > 0 (b) (P(X)=1 (c) (XP(X) = 2 (d) P(X) = -0.5 | | | |If C is a constant in a continuous probability distribution, then P( X=C) is always equal to: | | | |(a) Zero (b) One (c) negative (d) impossible | | | |E [X – E(X)] is : | | | |(a) E(X) (b) 0 (c) Var(X) (d) S.D.(X) | | | |E [X – E(X)]2 is : | | | |(a) E(X) (b) E(X2) (c) Var(X) (d) S.D.(X) | | | |In a discrete probability distribution the sum of all the probabilities is always equal to | | | |(a) Zero (b) One (c) Minimum (d) Maximum | | | |The total area under the curve of a continuous probability density function is always equal to | | | |(a) Zero (b) One (c) -1 (d) None of them | | |...

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