Gaokao Exam Mathematics: Probability and Statistics 3

Question 1

A student scores 75, 82, 90, 68, and 85 on five tests. What is the range of scores?

Accepted Answer

22

Answer

15

Answer

17

Answer

25

Question 2

In a stem-and-leaf plot, which part represents the last digit of each data value?

Accepted Answer

Leaf

Answer

Stem

Answer

Branch

Answer

Root

Question 3

A survey of 200 students found 120 prefer math over English. What is the relative frequency of students who prefer math?

Accepted Answer

0.6

Answer

0.4

Answer

0.5

Answer

0.8

Question 4

Which graph is most appropriate for displaying the distribution of a continuous variable such as exam scores?

Accepted Answer

Histogram

Answer

Bar chart

Answer

Pie chart

Answer

Scatter plot

Question 5

If the standard deviation of a dataset is 0, what does this imply about the data?

Accepted Answer

All values are identical

Answer

All values are negative

Answer

All values are zero

Answer

The dataset has only one value

Question 6

A conditional probability P(A|B) represents the probability of event A given that:

Accepted Answer

B has already occurred

Answer

A has already occurred

Answer

A and B are mutually exclusive

Answer

A and B are independent