EmSAT EmSAT Mathematics 3

Question 1

What is the mean of: 4, 8, 6, 10, 2?

Accepted Answer

6

Answer

8

Answer

5

Answer

7

Question 2

What is the median of: 3, 7, 1, 9, 5?

Accepted Answer

5

Answer

7

Answer

3

Answer

9

Question 3

A bag has 3 red and 7 blue balls. What is the probability of picking a red ball?

Accepted Answer

3/10

Answer

7/10

Answer

3/7

Answer

1/3

Question 4

What is the standard deviation a measure of?

Accepted Answer

Spread or variability in data

Answer

Central tendency

Answer

The most frequent value

Answer

The middle value

Question 5

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

Accepted Answer

68%

Answer

50%

Answer

95%

Answer

99.7%

Question 6

If P(A) = 0.4 and P(B) = 0.3 and A and B are independent, what is P(A and B)?

Accepted Answer

0.12

Answer

0.7

Answer

0.1

Answer

0.34