Probability-Probability Distributions [ISS (Statistical Services) Statistics Paper I]: Questions 60 - 63 of 108
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Question 60
Question MCQ▾
A standard, fair die is thrown until 5 sixes occur. Let denote the number of throws. Then variance of is ________.
Choices
Choice (4) | Response | |
---|---|---|
a. | 250 | |
b. | 900 | |
c. | 150 | |
d. | All of the above |
Question 61
Question MCQ▾
Which of the following statement is correct regarding Hyper geometric distribution?
Choices
Choice (4) | Response | |
---|---|---|
a. | Each individual of a population can be characterized as a success (S) or failure (F) . | |
b. | The population or set to be sampled consists of infinite number of elements. | |
c. | Hypergeometric random variable has larger variance than binomial random variable. | |
d. | Question does not provide sufficient data or is vague |
Question 62
Question MCQ▾
An urn contain 20 balls out of which 8 are black and 12 are white. 5 balls are selected without replacement, then what is the probability that exactly 2 balls are white balls?
Choices
Choice (4) | Response | |
---|---|---|
a. | 0.238 | |
b. | 0.636 | |
c. | 0.827 | |
d. | 0.542 |
Question 63
Question MCQ▾
If geometric distribution, then will have ________.
Choices
Choice (4) | Response | |
---|---|---|
a. | Uncountable and possibly infinite number of possible values. | |
b. | Uncountable number of possible values. | |
c. | Countable but possibly infinite number of possible values. | |
d. | Countable possibly finite number of possible values. |