ACET (Actuarial Common Entrance Test) Statistics: Questions 20 - 24 of 201

Access detailed explanations (illustrated with images and videos) to 201 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. Unlimited Access for Unlimited Time!

View Sample Explanation or View Features.

Rs. 200.00 or

How to register?

Question number: 20

» Continuous Random Variables » Variance

Edit
MCQ▾

Question

If the coefficient of correlation between X and Y is 0.28, covariance between X and Y is 7.6 and the variance of x is 9, then the standard deviation of Y series is:

Choices

Choice (4)Response

a.

9.05

b.

10.1

c.

10.05

d.

9.8

Question number: 21

» Measures of Spread » Range

Edit
MCQ▾

Question

The average marks scored by 50 students in a class were calculated to be 38. Later it was found that the marks of one student was wrongly read as 14 instead of 41. Find the correct average marks.

Choices

Choice (4)Response

a.

38.45

b.

38.54

c.

38.20

d.

38.7

Question number: 22

» Discrete Distributions » Binomial

Edit
MCQ▾

Question

Under which of the following circumstance, Binomial distribution is not used?

Choices

Choice (4)Response

a.

When the number of trials is indefinitely large

b.

When the outcome of the random experiment results in the dichotomous events

c.

All the trials are independent

d.

All of the above

Question number: 23

» Discrete Random Variables » Probabilities

Edit
MCQ▾

Question

In a group of 6 boys and 4 girls, four children are to be selected. In how many different ways can two boys and two girls be selected?

Choices

Choice (4)Response

a.

30

b.

90

c.

24

d.

Question does not provide sufficient data or is vague

Question number: 24

» Continuous Distributions » The Normal Distribution

Edit
MCQ▾

Question

A random variable X has the following probability distribution:

The random variable X

The random variable X

X

1

2

3

4

5

6

7

Find

Choices

Choice (4)Response

a.

b.

c.

d.

Developed by: