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

Choose Programs:

🎯 201 MCQs (& PYQs) with Full Explanations (2024-2025 Exam)

Rs. 200.00 -OR-

3 Year Validity (Multiple Devices)

CoverageDetailsSample Explanation

Help me Choose & Register (Watch Video) Already Subscribed?

Question 20

Question MCQ▾

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

Edit

Question 21

Question MCQ▾

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

Edit

Question 22

Question MCQ▾

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

Edit

Question 23

Question MCQ▾

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

Edit

Question 24

Question MCQ▾

A random variable X has the following probability distribution:

The Random Variable X
X1234567

Find

Choices

Choice (4)Response

a.

b.

c.

d.

Edit