[{"id":58077,"question":"In binomial distribution, the random variable &nbsp;has a range:","choices":[{"text":"0,1,2...................n","value":"A"},{"text":"0,1,2,......+∞","value":"B"},{"text":"-∞ to&nbsp;+∞","value":"C"},{"text":"∞ to +0","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":58076,"question":"In binomial experiment successive trials are:","choices":[{"text":"Dependent","value":"A"},{"text":"Independent","value":"B"},{"text":"May be independent or dependent","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":58075,"question":"Var (B/aX) =?","choices":[{"text":"1/aVar(X)","value":"A"},{"text":"b<sup>2</sup>/a<sup>2</sup> Var(X)","value":"B"},{"text":"b<sup>2</sup>/a Var(X)","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":58074,"question":"F (+∞) is always equal to:","choices":[{"text":"0","value":"A"},{"text":"Two","value":"B"},{"text":"One&nbsp;","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":58073,"question":"Hourly temperature recorded by weather brave is the example of:","choices":[{"text":"Discrete variable","value":"A"},{"text":"Continuous variable","value":"B"},{"text":"Qualitative","value":"C"},{"text":"Both A and B","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":58072,"question":"For two independent random variables, Var(x) = 14 and Var(Y ) = 5, then var (X-y) is equal to.","choices":[{"text":"9","value":"A"},{"text":"70","value":"B"},{"text":"19","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":58071,"question":"E(Y2) -[E(y)]2 is the formula, and to compute.","choices":[{"text":"Variance of the random variable","value":"A"},{"text":"Mean of the random variable","value":"B"},{"text":"Both A and B","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":58009,"question":"If y =-7x then E(y) = ...............","choices":[{"text":"E(x)","value":"A"},{"text":"-7X","value":"B"},{"text":"-7E(X)","value":"C"},{"text":"Zero","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":58008,"question":"The properties of discrete probability distribution are:","choices":[{"text":"Σp (x) = 1 and&nbsp;Σx. (x) = 1","value":"A"},{"text":"ΣP (x)= 1 and&nbsp;Σx. P","value":"B"},{"text":"ΣP(x) = 1 and 0 &lt; P(x)&nbsp;≤ 1","value":"C"},{"text":"All of these above","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":58007,"question":"The Area of trapezoid is equal to:","choices":[{"text":"sum of paralled sides x base","value":"A"},{"text":"sum of paralled sides x base/2","value":"B"},{"text":"2 x base x sum of paralled side&nbsp;","value":"C"},{"text":"Sum of paralled sides x base/4","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":58006,"question":"Coefficient &nbsp;of variation (C.V) is given below","choices":[{"text":"Mean /S.D x10","value":"A"},{"text":"Mean/S.D x 100","value":"B"},{"text":"S.D/Mean x 100&nbsp;","value":"C"},{"text":"S.D/ Mean&nbsp;","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":58005,"question":"For discrete random variable 'X' the expectation of X I-e E(x) is equal to:","choices":[{"text":"Σp(x)","value":"A"},{"text":"Σxp(x)","value":"B"},{"text":"Σx<sup>2</sup>p(x)","value":"C"},{"text":"One","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":58004,"question":"Var (KY) = ......................","choices":[{"text":"KY","value":"A"},{"text":"K<sup>2</sup> Var(Y)","value":"B"},{"text":"K<sup>2</sup>Var (Y)","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":58003,"question":"E(X ± Y) =..............","choices":[{"text":"E(X) + E(Y)","value":"A"},{"text":"E(X) - E (Y)","value":"B"},{"text":"E(x)&nbsp;± E (Y)","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":57999,"question":"A random variable is also called.","choices":[{"text":"Chance variable","value":"A"},{"text":"Stochastic variable","value":"B"},{"text":"Discrete variable","value":"C"},{"text":"Both A and B","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":57998,"question":"Which of the following is suitable for discrete probability distribution.","choices":[{"text":"Frequency polygon","value":"A"},{"text":"Probability","value":"B"},{"text":"Ogive","value":"C"},{"text":"Histogram","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":57993,"question":"The sum of probabilities of events of a sample space is always.","choices":[{"text":"Equal","value":"A"},{"text":"Discrete","value":"B"},{"text":"Continuous","value":"C"},{"text":"Always greater then oen","value":"D"},{"value":"E"}],"correctAnswer":1}]