ACET (Actuarial Common Entrance Test) Statistics: Questions 134 - 138 of 201

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Question number: 134

» Measures of Spread » Skewness

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MCQ▾

Question

In a distribution, the difference between the third and first quartiles is 4 and their sum is 74. Find the skewness if median is 36.

Choices

Choice (4)Response

a.

b.

-0.5

c.

1

d.

0.25

Question number: 135

» Probabilities » Bayes Theorem

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MCQ▾

Question

In an entrance test, there are multiple choice question. There are four possible answers to each question of which one is correct. The probability that a student knows the answer to a question is 90%. If he gets the correct answer to a question, then find the probability that he was guessing.

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 136

» Measures of Location » Mode

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MCQ▾

Question

Following is an incomplete distribution having modal mark as 45

Incomplete distribution having modal Incomplete distribution having modal

Marks

0 - 20

20 - 40

40 - 60

60 - 80

80 - 100

No. of Students

5

8

?

12

5

What would be the mean marks?

Choices

Choice (4)Response

a.

52.22

b.

48

c.

46.67

d.

50

Question number: 137

» Discrete Distributions » Binomial

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MCQ▾

Question

Suppose you take a multiple choice test with 10 questions and each question has 5 answer choices (a, b, c, d, e). What is the probability that you get exactly 4 questions correct just by guessing?

Choices

Choice (4)Response

a.

b.

c.

d.

None of the above

Question number: 138

» Measures of Spread » Variance

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MCQ▾

Question

Let be the values taken by a variable X and be the values taken by a variable Y such that . Then,

Choices

Choice (4)Response

a.

b.

c.

d.

All of the above

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