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 |
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 |
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 |
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 |
Question 24
Question MCQ▾
A random variable X has the following probability distribution:
X | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
Find
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |