Practise questions · Salam Academy

SA-4024-ST-0031 markL1 FoundationCalculatorFrequency tables

For the journey times in the previous question (

0

–

10

:

4

;

10

–

20

:

9

;

20

–

30

:

5

;

30

–

40

:

2

), the modal class is

Salam Academy Original Practice · Proposed mark scheme

SA-4024-ST1-0011 markL1 FoundationNon-calculatorAverages

Find the median of

3,\ 8,\ 1,\ 9,\ 5,\ 7,\ 2

.

Salam Academy Original Practice · Proposed mark scheme

SA-4024-ST1-0031 markL1 FoundationCalculatorAverages

A shoe shop wants to know which size to order most of. Which average should it use?

Salam Academy Original Practice · Proposed mark scheme

SA-4024-ST-G014 marksL1 FoundationNon-calculatorAverages

For the data

4,\ 7,\ 7,\ 9,\ 12,\ 15

, find the mean, the median, the mode and the range.

Salam Academy Original Practice · Proposed mark scheme

SA-4024-ST-Q011 markL1 FoundationCalculatorAverages

The range of a data set is

Salam Academy Original Practice · Proposed mark scheme

SA-4024-ST-0012 marksL2 StandardCalculatorFrequency tables

The scores of

20

students are: score

1

(frequency

3

), score

2

(frequency

5

), score

3

(frequency

8

), score

4

(frequency

4

). Calculate the mean score.

Salam Academy Original Practice · Proposed mark scheme

SA-4024-ST-0023 marksL2 StandardCalculatorFrequency tables

Journey times (minutes) of

20

people:

0<t\le10

:

4

;

10<t\le20

:

9

;

20<t\le30

:

5

;

30<t\le40

:

2

. Calculate an estimate of the mean time.

Salam Academy Original Practice · Proposed mark scheme

SA-4024-ST-0062 marksL2 StandardNon-calculatorAverages

The mean of five numbers is

12

. Four of them are

10

,

8

,

15

and

11

. Find the fifth number.

Salam Academy Original Practice · Proposed mark scheme

SA-4024-ST-0072 marksL2 StandardNon-calculatorAverages

The mean of

8

numbers is

15

. A ninth number,

24

, is added. Find the new mean.

Salam Academy Original Practice · Proposed mark scheme

SA-4024-ST-0151 markL2 StandardCalculatorAverages

House prices in a street include one very expensive house. Which average best represents a typical price?

Salam Academy Original Practice · Proposed mark scheme

SA-4024-ST1-0022 marksL2 StandardNon-calculatorFrequency tables

The scores of

20

students are: score

0

(frequency

4

), score

1

(frequency

7

), score

2

(frequency

6

), score

3

(frequency

3

). Find the median score.

Salam Academy Original Practice · Proposed mark scheme

SA-4024-ST-0164 marksL4 ChallengingNon-calculatorAverages

The four numbers

x

,

2x

,

3x

and

10

have a mean of

13

. (i) Find

x

. (ii) Find the median of the four numbers.

Salam Academy Original Practice · Proposed mark scheme

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