# ACET (Actuarial Common Entrance Test) Statistics: Questions 38 - 43 of 201

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## Question 38

### Question

MCQ▾

For 50 students of a class the regression equation of marks in Statistics and Mathematics is , where X and Y respectively represent marks in Statistics and Mathematics is 44, then the mean marks in Statistics are

### Choices

Choice (4)Response

a.

72.5

b.

54.2

c.

62.4

d.

24.9

## Question 39

### Question

MCQ▾

Which of the following is NOT a frequency diagram?

### Choices

Choice (4)Response

a.

Ogive

b.

Pie Chart

c.

Histogram

d.

Polygon

## Question 40

### Question

MCQ▾

For a bivariate data, the mean value of , the mean value of , the regression coefficient of Y on X is and the correlation coefficient between X and Y is . Find the regression coefficient of X on Y.

### Choices

Choice (4)Response

a.

b.

c.

d.

Question does not provide sufficient data or is vague

## Question 41

### Question

MCQ▾

Two events A and B are mutually exclusive and . Find the probability that either A or B will occur.

### Choices

Choice (4)Response

a.

b.

c.

d.

Question does not provide sufficient data or is vague

## Question 42

### Question

MCQ▾

The Mean and Median values of a series are 16 cm and 20 cm respectively. What is the modal value of the series?

### Choices

Choice (4)Response

a.

18

b.

20

c.

28

d.

24

## Question 43

### Question

MCQ▾

Which probability distribution is suitable for calculating the number of air accidents in some unit of time?

### Choices

Choice (4)Response

a.

Binomial

b.

Normal

c.

Geometric

d.

Poisson

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