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50 questions · timed · auto-graded

MCQ 11 Mark
The binomial distribution has mean $5$ and variance $\frac{10}{7}$ . What will be the type of this distribution $?$
  • A
    Positively skewed
  • Negatively skewed
  • C
    Symmetric
  • D
    Nothing can be said about the distribution.
Answer
Correct option: B.
Negatively skewed
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MCQ 21 Mark
For which value of $x,$ the value of $p(x)$ of binomial distribution with parameters $n = 4$ and $p = \frac 12$ becomes maximum?
  • A
    $0$
  • $2$
  • C
    $3$
  • D
    $4$
Answer
Correct option: B.
$2$
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MCQ 31 Mark
For a positive skewed binomial distribution with $n=10,$ which of the following values might be the value of mean?
  • A
    $5$
  • $3$
  • C
    $9$
  • D
    $7$
Answer
Correct option: B.
$3$
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MCQ 41 Mark
For the probability distribution of a discrete random variable, $E(X)=5$ and $E\left(X^2\right)=35$. What will be the variance of this distribution?
  • A
    $40$
  • B
    $30$
  • C
    $20$
  • $10$
Answer
Correct option: D.
$10$
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MCQ 51 Mark
Mean and variance of a discrete probability distribution are $3$ and $7$ respectively. What will be $E(X^2)$ for this distribution?
  • A
    $10$
  • B
    $4$
  • C
    $40$
  • $16$
Answer
Correct option: D.
$16$
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MCQ 61 Mark
A random variable $X$ assumes the values $-2,0$ and $2$ only with respective probabilities $\frac{1}{5}, \frac{3}{5}$ and $k$. If $0$
  • $\frac{1}{5}$
  • B
    $\frac{4}{5}$
  • C
    $\frac{2}{5}$
  • D
    $\frac{3}{5}$
Answer
Correct option: A.
$\frac{1}{5}$
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MCQ 71 Mark
A random variable $X$ assume the values of $-1, 0$ and $1$ with respective probability $1/5, K$ and $1/3,$ where $0$
  • A
    $\frac{2}{5}$
  • B
    $\frac{3}{5}$
  • $\frac{2}{15}$
  • D
    $\frac{3}{15}$
Answer
Correct option: C.
$\frac{2}{15}$
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MCQ 81 Mark
Which variable of the following will be an illustration of continuous variable?
  • A
    Number of accident occurring at any place
  • B
    Number of rainy days during a year
  • Maximum temperature during a day
  • D
    Number of children in a family
Answer
Correct option: C.
Maximum temperature during a day
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MCQ 91 Mark
Which of the following is the formula of probability of an event of not getting a success in the binomial distribution with parameters $n$ and $p?$
  • A
    ${ }^n C_0 p^n q^0$
  • ${ }^n C_0 p^0 q^n$
  • C
    ${ }^n C_0 p^n$
  • D
    ${ }^n C_0 p^n q$
Answer
Correct option: B.
${ }^n C_0 p^0 q^n$
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MCQ 101 Mark
Which variable of the following will be an illustration of discrete variable?
  • A
    Height of a student
  • B
    Weight of a student
  • C
    Blood Pressure of a student
  • Birth year of a student.
Answer
Correct option: D.
Birth year of a student.
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MCQ 111 Mark
What is the value of Mean in accordance with its variance in binomial probability distribution?
  • More
  • B
    Equal
  • C
    Less
  • D
    Less than
Answer
Correct option: A.
More
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MCQ 121 Mark
In a binomial distribution $n = 18$ and $p – q =\frac{1}{3}$ , than what is the value of standard deviation?
  • A
    $0$
  • B
    $4$
  • $2$
  • D
    $1$
Answer
Correct option: C.
$2$
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MCQ 131 Mark
In a binomial distribution $np :  npq = 8 : 7,$ than what is the value of $p?$
  • A
    $\frac{7}{8}$
  • B
    $\frac{7}{15}$
  • $\frac{1}{8}$
  • D
    $\frac{8}{15}$
Answer
Correct option: C.
$\frac{1}{8}$
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MCQ 141 Mark
In a binomial distribution $n=10$ and $p=0.6$ than, what is the value of $p?$
  • A
    $6$
  • $2.4$
  • C
    $4$
  • D
    $\sqrt{2.4}$
Answer
Correct option: B.
$2.4$
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MCQ 151 Mark
If in binomial distribution $p = q$ than what will be the type of this distribution?
  • A
    Continuous
  • B
    Different
  • Symmetrical
  • D
    Mixed
Answer
Correct option: C.
Symmetrical
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MCQ 161 Mark
In a binomial distribution $q – p = \frac{3}{5}$, then what is the type of skweness?
  • Positive
  • B
    Zero
  • C
    Negative
  • D
    Infinite
Answer
Correct option: A.
Positive
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MCQ 171 Mark
Parameters $P$ of a binomial random variance $X,$ if $4p+q=2,$ than what is the value of $p?$
  • A
    $\frac{1}{2}$
  • $\frac{1}{3}$
  • C
    $\frac{4}{5}$
  • D
    $\frac{1}{5}$
Answer
Correct option: B.
$\frac{1}{3}$
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MCQ 181 Mark
In a binomial distribution $n = 8$ and $p =\frac{3}{5}$ , then what is the value of its variance$?$
  • A
    $4.8$
  • B
    $1.6$
  • C
    $1.92$
  • $2.4$
Answer
Correct option: D.
$2.4$
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MCQ 191 Mark
In binomial distribution $n = 10$ and $q = \frac{4}{5}$, then what is the value of Mean?
  • $2$
  • B
    $8$
  • C
    $4$
  • D
    $6$
Answer
Correct option: A.
$2$
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MCQ 201 Mark
In a binomial distribution if $n = 12$ and $1 – q = \frac{1}{4}$, then what is the value of mean?
  • $3$
  • B
    $5$
  • C
    $4$
  • D
    $9$
Answer
Correct option: A.
$3$
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MCQ 211 Mark
The binomial distribution ha mean $6$ and variance $\frac{3}{7}$. What will be the type of this distribution?
  • A
    Positively skewed
  • negatively skewed
  • C
    Symmetric
  • D
    Nothing can be said
Answer
Correct option: B.
negatively skewed
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MCQ 221 Mark
For which of value of $x,$ the value of $p (x)$ of binomial distribution with parameters $n=5$ and $p = \frac{1}{3}$ becomes maximum?
  • A
    $0$
  • $2$
  • C
    $3$
  • D
    $4$
Answer
Correct option: B.
$2$
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MCQ 231 Mark
For a negatively skewed binomial distribution with $n = 15,$ which of the following values might be the values of mean?
  • A
    $4$
  • B
    $6$
  • C
    $5$
  • $9$
Answer
Correct option: D.
$9$
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MCQ 241 Mark
For a positively skewed binomial distribution with $n = 12$ which of the following values might be the value of mean?
  • $4$
  • B
    $6$
  • C
    $8$
  • D
    $10$
Answer
Correct option: A.
$4$
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MCQ 251 Mark
For the probability distribution of a discrete random variable $E(X) = 4$ and $E(X^2) = 35,$ What will be the variance of this distribution?
  • $9$
  • B
    $21$
  • C
    $29$
  • D
    $41$
Answer
Correct option: A.
$9$
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MCQ 261 Mark
Mean and variance of a discrete probability distribution are $4$ and $9$ respectively. What will be $E(X^2)$ for this distribution?
  • A
    $13$
  • B
    $5$
  • $25$
  • D
    $65$
Answer
Correct option: C.
$25$
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MCQ 271 Mark
A random variable assumes the values of $0,1$ and $2$ with respective probability $\frac{15}{18}, K$ and $\frac{1}{6}$ , where $0 < K < 1$ then what is the value of $K?$
  • A
    $\frac{4}{9}$
  • B
    $\frac{6}{9}$
  • $\frac{5}{9}$
  • D
    $\frac{8}{9}$
Answer
Correct option: C.
$\frac{5}{9}$
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MCQ 281 Mark
A random variable $X$ assumes the values $-4, 3$ and $10$ with respective probability $\frac{2}{5}, K$ and $\frac{1}{15}$ , where $0 < K < 1$ and $X$ does not assume any value other than these values. What will be the value of $E(X)?$
  • $\frac{2}{3}$
  • B
    $\frac{2}{15}$
  • C
    $\frac{2}{5}$
  • D
    $\frac{3}{15}$
Answer
Correct option: A.
$\frac{2}{3}$
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MCQ 291 Mark
For which value of $P$ binomial probability distribution is symmetrical$?$
  • A
    $p = 0$
  • B
    $p > \frac{1}{2}$
  • C
    $p < \frac{1}{2}$
  • $p = \frac{1}{2}$
Answer
Correct option: D.
$p = \frac{1}{2}$
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MCQ 301 Mark
If $p> \frac{1}{2}$ in a binomial distribution. What is the type of skewness?
  • A
    Positive
  • Negative
  • C
    Zero
  • D
    Infinite
Answer
Correct option: B.
Negative
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MCQ 311 Mark
If $p < \frac{1}{2}$ in a binomial distribution. What is the type of skewness?
  • Positive
  • B
    Negative
  • C
    Zero
  • D
    Infinite
Answer
Correct option: A.
Positive
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MCQ 321 Mark
Symbol of random variable $X$ which defines sample space is $X: U→R.$ If $U=\{HH, TH, HT, TT\}$ and $X$ is showing number of heads than what is the set for assume value of variable $X?$
  • A
    $\{0, 1\}$
  • $\{0, 1, 2\}$
  • C
    $\{1, 2\}$
  • D
    $\{0, 2\}$
Answer
Correct option: B.
$\{0, 1, 2\}$
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MCQ 331 Mark
In a binomial probability distribution $p = q = \frac{1}{2}$, then what will be the type of this distribution?
  • A
    Mixed
  • B
    Continuous
  • C
    Dissymmetrical
  • Symmetrical
Answer
Correct option: D.
Symmetrical
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MCQ 341 Mark
What is the relation between values of mean and variance in binomial probability distribution?
  • $npq < np$
  • B
    $npq > np$
  • C
    $npq = np$
  • D
    $np\neq pq$
Answer
Correct option: A.
$npq < np$
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MCQ 351 Mark
State the parameters of binomial probability distribution.
  • A
    $p$ and $q$
  • B
    $n$ and $q$
  • $n$ and $p$
  • D
    $n, p$ and $q$
Answer
Correct option: C.
$n$ and $p$
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MCQ 361 Mark
What is the value of probability of success $P$ in binomial probability distribution $?$
  • A
    $1$
  • B
    $\geq^1$
  • C
    $\leq^1$
  • Between $0$ and $1.$
Answer
Correct option: D.
Between $0$ and $1.$
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MCQ 371 Mark
What type of distribution is the binomial distribution?
  • Discrete
  • B
    Symmetrical
  • C
    Continuous
  • D
    Mixed
Answer
Correct option: A.
Discrete
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MCQ 381 Mark
What is the probability of success in each trial of Bernoulli trials?
  • Equal
  • B
    Different
  • C
    Constant
  • D
    More than Zero
Answer
Correct option: A.
Equal
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MCQ 391 Mark
State the interval of probability of success $P (S).$
  • A
    $(-1, 0)$
  • B
    $(-1, 1)$
  • $(0, 1)$
  • D
    $(-3, 3)$
Answer
Correct option: C.
$(0, 1)$
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MCQ 401 Mark
If $P (S) = p$ and $P (F) = q,$ then what is the value of $p + q?$
  • A
    $0$
  • B
    Between $0$ and $1$
  • $1$
  • D
    Between $-1$ and $1$
Answer
Correct option: C.
$1$
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MCQ 411 Mark
State the sample space associated with a dichotomous experiment.
  • $U = {S, F}$
  • B
    $U = {F, F}$
  • C
    $U = {S, S}$
  • D
    $U=\left\{x_1, x_2, \ldots \ldots x_n\right\}$
Answer
Correct option: A.
$U = {S, F}$
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MCQ 421 Mark
What is the value of $\Sigma p(x)$ of probability distribution of continuous random variable of $P (x)?$
  • A
    $0$
  • $1$
  • C
    $\geq 1$
  • D
    $\leq 1$
Answer
Correct option: B.
$1$
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MCQ 431 Mark
State the interval of probability $P(x)$ for the each value of $X$ in random variable $X?$
  • A
    Between $-1$ and $1$
  • B
    Between $-1$ and $0$
  • Between $0$ and $1$
  • D
    Between $-3$ and $3$
Answer
Correct option: C.
Between $0$ and $1$
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MCQ 441 Mark
What is the symbol of probability distribution of a random variable $X?$
  • A
    $P(S)$
  • B
    $P(F)$
  • $P(x)$
  • D
    $P(n)$
Answer
Correct option: C.
$P(x)$
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MCQ 451 Mark
Which of the following is a continuous random variable?
  • A
    Number of children
  • B
    Number of errors
  • C
    Number of accident
  • Temperature
Answer
Correct option: D.
Temperature
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MCQ 461 Mark
Which of the following is not a discrete random variable?
  • A
    Number of children
  • Height of Students
  • C
    Number of errors
  • D
    Number of accident
Answer
Correct option: B.
Height of Students
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MCQ 471 Mark
Which type of random variable is “Temperature of a place”?
  • Continuous random variable
  • B
    Simple random variable
  • C
    Discrete random variable
  • D
    Layered random variable
Answer
Correct option: A.
Continuous random variable
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MCQ 481 Mark
While throwing a dice number getting on the top of the dice which type of random variable?
  • A
    Continuous random variable
  • Discrete random variable
  • C
    Simple random variable
  • D
    Layered random variable
Answer
Correct option: B.
Discrete random variable
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MCQ 501 Mark
Which variable of the following will be an illustration of continuous variable ?
  • A
    Number of accidents occurring at any place
  • B
    Number of rainy days during a year
  • Maximum temperature during a day
  • D
    Number of children in a family
Answer
Correct option: C.
Maximum temperature during a day
C
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MCQ - Statistics STD 12 Commerce Questions - Vidyadip