Statistics / Grade 9

1.

Multiple Choice

1 min

1 pt

A set of drivers were asked about the number of accidents made in one year. Their answers were abbreviated in the following table:

The total number of surveyed drivers is:

20

70

4

10

2.

Multiple Choice

3 mins

1 pt

A set of drivers were asked about the number of accidents made in one year. Their answers were abbreviated in the following table:

The number of drivers that made no accidents is:

0

3

5

7

3.

Multiple Choice

3 mins

1 pt

A set of drivers were asked about the number of accidents made in one year. Their answers were abbreviated in the following table:

The percentage of drivers who made 4 accidents is:

4%

20%

25%

60%

4.

Multiple Choice

3 mins

1 pt

A set of drivers were asked about the number of accidents made in one year. Their answers were abbreviated in the following table:

The mean (average) number of accidents is performed by a driver is:

1.5

2

2.5

1

5.

Multiple Choice

3 mins

1 pt

Knowing that the total of a certain surveyed population is 25. The central angle of a value whose frequency 5 is:

$20\degree$

$72\degree$

$90\degree$

$105\degree$

6.

Multiple Choice

3 mins

1 pt

The five grades of a student over 20 are: 10 ; 12 ; 13 ; 16 and 19. The average grade is:

13

14

14.5

15

7.

Multiple Choice

45 sec

1 pt

The statistical data can be represented by:

Frequency bar graph

Pie graph

Increasing cumulative frequency polygon

All choices

8.

Multiple Select

5 mins

1 pt

Choose all correct answers by referring to the following bar graph representing a statistical series:

The total frequency is 45

The total frequency is 25

The value 6 is the most frequent value

The % relative frequency for the value 7 is 20%

The % relative frequency for the value 7 is 24%

9.

Fill in the Blank

3 mins

1 pt

The adjacent graphic represents the cumulative frequency polygon of the students' grades in a certain class.

What is the number of the students of this class?

10.

Fill in the Blank

3 mins

1 pt

The adjacent graphic represents the cumulative frequency polygon of the students' grades in a certain class.

How many students got a grade 8?

11.

Fill in the Blank

3 mins

1 pt

The adjacent graphic represents the cumulative frequency polygon of the students' grades in a certain class.

How many student got a grade 9?

12.

Fill in the Blank

3 mins

1 pt

The adjacent graphic represents the cumulative frequency polygon of the students' grades in a certain class.

what is the relative frequency of the grade 8?

13.

Multiple Select

30 sec

1 pt

Which of the following are discrete data? Choose one or more

Number of TV Programs watched

Length of a leaf

Number of goals scored

Colour of cars in a car park

Weight of potatoes

14.

Multiple Choice

5 mins

1 pt

Calculate the MEDIAN for the data set: 6, 7, 12, 8, 7, 4, 8, 8, 7

7

7.44

8

7 and 8

15.

Multiple Choice

5 mins

1 pt

Calculate the MODE for the data set: 6, 7, 12, 8, 7, 4, 8, 8, 7

7

7.5

8

7 and 8

16.

Multiple Choice

5 mins

1 pt

What was the most common IQ range?

91-100

111-120

12-130

101-110

17.

Multiple Choice

30 sec

1 pt

The mean of this data set is 17.8. What would happen to the mean if 40 was added to the data set?

The mean would not change

The mean would go up

The mean would go down

18.

Multiple Choice

15 mins

1 pt

Can there be more than one mode?

Yes

No

19.

Multiple Choice

30 sec

1 pt

The scores of a student in five test were 10, 8, 13, x, and 9. Knowing that the mean of these five scores is 12, then x is

12

14

18

20

20.

Fill in the Blank

30 sec

1 pt

To obtain a grade A, Youseff’s mean score in

five tests must be 85 or more. Youseff has

scored 86, 94, 75 and 88 in four tests.

What is his minimum mark in the fifth test

to get a grade A?

The minimum mark in the fifth test should be

21.

Fill in the Blank

30 sec

1 pt

The mean number of emails Adele received during a week was 51. The numbers received

for the first six days were 39, 57, 70, 45, 71 and 32. Find how many emails she received

on the seventh day.

She received _ emails on the seventh day.

22.

Multiple Choice

30 sec

1 pt

Find the Median of the following chart

3.3

2.5

4

3.5

23.

Multiple Choice

5 mins

1 pt

Calculate the MEAN for the data set: 6, 7, 12, 8, 7, 4, 8, 8, 7

7

7.44

8

7 and 8

24.

Multiple Choice

5 mins

1 pt

The salary of the employees in the office were $15,000; $18,000; $16,000; $14,000; $90,000; and $17,000. What is the best measure of the central tendency of the salaries?

Mean

Median

Mode

Range

25.

Multiple Choice

5 mins

1 pt

The heights of the starting 5 players on a basketball team are 60 inches, 67 inches, 64 inches, and 65 inches. If the mean or balance point of the players is 65, what is the height of the 5th player?

70

69

61

68

26.

Multiple Choice

15 mins

1 pt

What do you do if there are two numbers in "the middle" when you are finding the median?

Pick your favorite number

Add the two numbers in the middle & then divide by two.

They are both the median

None of the above

27.

Fill in the Blank

30 sec

1 pt

Find the mean of the data

28.

Fill in the Blank

30 sec

1 pt

Find the median of the data

29.

Multiple Choice

30 sec

1 pt

What is the mean of this set of data?

2, 15, 7

24

3

6

8

30.

Multiple Choice

3 mins

1 pt

Find the median of these numbers:
2, 3, 4, 5, 5, 7

4

5

4.5

6

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