NSAA NSAA Mathematics - Statistics and Probability 2

Question 1

In a normal distribution, approximately what percentage of data lies within one standard deviation of the mean?

Accepted Answer

68%

Answer

50%

Answer

95%

Answer

99.7%

Question 2

How many ways can 4 books be arranged on a shelf?

Accepted Answer

24

Answer

4

Answer

12

Answer

16

Question 3

A card is drawn from a standard 52-card deck. What is the probability that it is a heart or a king?

Accepted Answer

17/52

Answer

4/13

Answer

16/52

Answer

1/4

Question 4

The interquartile range (IQR) is calculated as:

Accepted Answer

Q3 - Q1

Answer

Q1 - Q3

Answer

Q3 - median

Answer

median - Q1

Question 5

From a group of 5 people, how many ways can a committee of 3 be chosen?

Accepted Answer

10

Answer

6

Answer

15

Answer

20

Question 6

What is P(A|B) if P(A∩B) = 0.12 and P(B) = 0.4?

Accepted Answer

0.3

Answer

0.048

Answer

0.52

Answer

3.33