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Module 0 - Entry Exam Questions and Answers

Question 1

A discrete random variable can only take the values 2,3,4 or 5. The probabilities associated with some of the outcomes are: P(X=2) = 0.2, P(X=3) = 0.3, P(X=5) = 0.1.

 

For a randomly drawn value of X, calculate P(X>3).

Options:

A.

0.1

B.

0.4

C.

0.5

D.

0.8

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Question 2

Consider a function f which has three variables, x1, x2 and x3.

 

Identify which of the following gives a correct definition of a partial derivative of the function f.

Options:

A.

The derivative of f with respect to either one of its variables or two of its variables, the other two variables or the third variable being treated as constant, respectively.

B.

The derivative of f with respect to one of its variables only, the other two variables being treated as constant.

C.

The derivative of f with respect to two of its variables, the third variable being treated as constant.

D.

The derivative of f with respect to all three of its variables.

Question 3

Three light bulbs are chosen at random from 15 bulbs of which 5 are known to be defective.

 

Calculate the probability that exactly one of the three is defective.

A)

B)

C)

D)

Options:

A.

Option A

B.

Option B

C.

Option C

D.

Option D

Question 4

Let A = 

Let B = 

 

Calculate   

Options:

A.

986

B.

1,224

C.

2,056

D.

3,286

Question 5

Determine which of the options is equal to log(3) - 2log(x+1).

A)

B)

C)

D)

Options:

A.

Option A

B.

Option B

C.

Option C

D.

Option D

Question 6

A recurrence relation is given by: Un = 2Un - 1 + 3

 

If U0 = 0, calculate U2 =  

Options:

A.

3

B.

9

C.

13

D.

21

Question 7

The stem and leaf chart below shows the ages of all the pensioners in a small village.

 

 

Identify which of the following is not true.

Options:

A.

There are 13 pensioners in the village.

B.

The most common age is 63.

C.

The oldest pensioner is 89.

D.

There is a pensioner aged 70.

Question 8

For random variable X, use the following statistics to calculate its coefficient of skewness based on central moments.

E(X) = 3.940

E(X2) = 21.466

skew(X) = E[(X - μ)3] = 6.008

Options:

A.

-0.415

B.

0.060

C.

0.415

D.

0.768

Question 9

Identify which of the following statements are true.

 

I. Skewness measures how peaked a set of data is.

II. Skewness is a measure of asymmetry of the distribution of the data about its mean.

III. For a symmetrically distributed data, the mean equals the median but not necessarily the mode.

IV. The value of a measure of skewness can be positive, zero or negative.

Options:

A.

I and II

B.

II and IV

C.

I and III

D.

II, III and IV

Exam Detail
Vendor: IFoA
Exam Code: IFoA_CAA_M0
Last Update: Dec 25, 2024
IFoA_CAA_M0 Question Answers
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Total 64 questions