Probability MCQ's
Probability MCQ's
Probability MCQ's
2. Mode refers to the value within a series that occurs ________ number of times.
a. Maximum b. Minimum c. Zero d. Infinite
2. A fair six-sided die is rolled. What is the probability of rolling an odd number?
3. Two coins are flipped simultaneously. What is the probability of getting two heads?
A) ½ B) 1/3 C) ¼ D) 1/8
4. A bag contains 6 red balls and 4 blue balls. If one ball is randomly drawn, what is the probability of
getting a red ball?
5. A jar contains 10 red marbles, 5 green marbles, and 5 blue marbles. If one marble is randomly chosen,
what is the probability of selecting a blue marble?
6. A box contains 8 black pens and 4 blue pens. If two pens are drawn without replacement, what is the
probability of getting two black pens?
7. In a class of 30 students, 15 are girls and 15 are boys. If a student is selected at random, what is the
probability of selecting a boy?
A) ½ B) ¼ C) 1/3 D) 2/3
8. A bag contains 5 red marbles, 3 green marbles, and 2 blue marbles. If two marbles are drawn with
replacement, what is the probability of getting a red marble on the first draw and a green marble on the
second draw?
9. A spinner has 6 equal sectors labeled 1 through 6. What is the probability of spinning an even
number?
10. A bag contains 3 red balls and 7 blue balls. Two balls are randomly drawn without replacement.
What is the probability of drawing a red ball and then a blue ball?
2) In Poisson Distribution:
a) Mean and Variance are not equal b) Mean and Variance are equal
c) Mean and Co-Variance are not equal d) Mean and Co-Variance are equal
a) With low mean b) With high mean c) With zero mean d) All of the above
(A) Sampling frame (B) Sampling units (C) Sampled population (D) Sample design
2. Which of the characteristic relates to population?
(A) Parameter (B) Statistic (C) Sampling distribution (D) Sampling error
(A) Fixed numbers (B) Variable numbers (C) Qualitative numbers (D) None of these
(A) Non-probability sampling (B) Probability sampling (C) Systematic sampling (D) Quota
sampling
7. Total number of possible sample with N=2 and n=3 with replacement is?
(A) Fixing(n) (B) Decreasing (n) (C) Increasing (n) (D) Increasing (N)
(A) Sampling error (B) Sampling distribution (C) Standard error (D) Parameter
(A) (C)
(B) (D)
2. The null hypothesis for the difference between two population means is:
4. Suppose we wish to test whether a population mean is smaller or larger than 10. What should our
alternative hypothesis?
a) 𝜇 < 10 b) 𝝁 ≠ 𝟏𝟎 c) 𝜇 > 10 d) 𝜇 ≤ 10
5. When 𝜎 is known, then which test statistic is appropriate about population mean?
a) t b) z c) 𝜒2 d) F
a) 0 to 1 b) -1 to +1 c) 0 to ∞ d) −∞ 𝒕𝒐 + ∞
7. When the alternative hypothesis is H1: 𝜇 ≠ 𝜇0 (𝑡𝑤𝑜 𝑠𝑖𝑑𝑒𝑑), then the rejection region will be:
8. The test statistic-t is defined as deviation of sample mean from population mean µ expressed in terms
of:
a) n b) n-1 c) n-2 d) n1 + n2 – 2
10. In an unpaired sample t- test with sample sizes n1 = 11 and n2 = 11, the value of tabulated t should
be obtained for:
5. Which of the following graphs shows a Strong Negative Correlation between two variables?
A B
C D
6. In regression, the equation that describes how the response variable (y) is related to the explanatory
variable (x) is:
8.If two variables, x and y, have a very strong linear relationship, then
10.In regression analysis, the variable that is used to explain the change in the outcome of an
experiment, or some natural process, is called
3. _________ the target variable can have three or more possible values without any order.
4. Which of the following is used where the target variable is of categorical nature?
C. It performs well for simple datasets as well as when the data set is linearly separable
C. Both A and B