# ISS (Statistical Services) Statistics Paper I (New 2016 MCQ Pattern): Questions 255 - 259 of 472

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## Question 255

### Question

MCQ▾

Hospital records show that of patients suffering from a certain disease, 85 % die of it. What is the probability that of 5 randomly selected patients, 4 will recover?

### Choices

Choice (4)Response

a.

0.0021

b.

0.0454

c.

0.0254

d.

All of the above

## Question 256

### Question

MCQ▾

The characteristic function of standard Cauchy distribution is ________.

### Choices

Choice (4)Response

a.

b.

c.

d.

Question does not provide sufficient data or is vague

## Question 257

### Question

MCQ▾

Which of the following statement is/are correct regarding De Moivre – Laplace theorem?

### Choices

Choice (4)Response

a.

It is valid for very large values of n.

b.

It states that the normal distribution may be used as an approximation to the binomial distribution.

c.

It is a special case of the Chebyshev՚s inequality.

d.

All of the above

## Question 258

### Question

MCQ▾

A biased coin (with probability of obtaining a Head equal to p > 0) is tossed repeatedly and independently until the first head is observed. What is the probability that the first head appears at an even numbered toss?

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question 259

### Question

MCQ▾

A factory produces chocolates which are where quantity measured in grams. Chocolates which are lighter than 3.5 gram or heavier than 4.4 gram are rejected. Out of a bunch of 100 chocolates how many would be acceptable?

### Choices

Choice (4)Response

a.

47

b.

90

c.

86

d.

72