Unit 1 Exam Prep

8/4/2019 Unit 1 Exam Prep

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Probability & Statistics, with a sprinkling of

Algebra and Number.

*


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*

*Where there are questions for slides, the first

slide contains only the question. This meansthat you will be able to use the Smartboard to

annotate the question.

*The next slide contains the question and

solutions, which appear when you click next.

*The exam tips are at the end of thePowerPoint.


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*

Exam Technique

Algebra

Number

Statistics

Probability

Oops! Q1

Oops! Q2

Oops! Q3

Clicking (or pressing) on the relevant button willtake you to the relevant slide.


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*The Algebra may be covered within anotherquestion, or have a question all on its own.


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*Your command of number is tested throughout thepaper, but there may be some specific questions.


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57.5

56.5

You could write down 57.4999 or5.49 to get the mark, but not 57.49.

.

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18:12 3:2

54

65

45

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4500 x (0.04)=180

4500 x (1.04)3=5061.888

5061.888-4500=561.888

4500 100 x 4=180 180x3= 540

561.888-540= 21.888

21.89

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2400 x (1.075)n=3445.51

Try n=3

2400 x (1.075)3=2981.51

Try n=4

2400 x (1.075)4=3205.13

Try n=5

2400 x (1.075)5=3445.51

5

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12000 x (0.9)3=8748

8748Or subtract 10% from 12000

Then subtract 10% from the new amount

Then repeat once more.

12000 x (0.9)n=6000

Try n=5 12000 x (0.9)5=7085.88

Try n=6 12000 x (0.9)6=6377.292

Try n=7 12000 x (0.9)7

=5739.5628

7

Over6yrs butinto the 7th

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*This section is mainly about performing calculations with data

and being able to communicate based on the data.


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(4 Marks)

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(4 Marks)

10

4

18

6

2

Blue

Red

Silver

Black

Green

0

2

4

6

8

10

12

14

16

18

20

Blue Red Silver Black Green

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354580

101525

5

2530

205

25

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(6 Marks)

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Mean weight for a boy: 430 7 = 61.43

Mean weight for a girl: 503 9 = 55.89Boys have a higher mean weight.

Median weight for a boy: 65

Median weight for a girl: 61

Boys have a higher median weight.Range for boys: 72-45=27

Range for girls: 67-44=23

Girls have a lower range of weights.

(6 Marks)

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(6 Marks)

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Use the midpoint of the group, 70,to give an estimate: 70 x 8 = 560

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(3 Marks)

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(3 Marks)

0x5=01x9=92x7=14

3x4=124x3=125x2=10

fx

x f

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(3 Marks)

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*Some questions may be solely based on

probability, whereas others link into the other areas

covered.


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(3)

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(3)

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*Top Six Tips


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* Whilst you are waiting to

start, read through the instructions

on the front (even if you know

them). It will help a little with

nerves and get you even more

focussed for the exam.

*


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* The formulae for Unit 1 are not very

useful, but you can write on the page.

* As soon as you are allowed to

write, write down any formulae you

are likely to need (e.g. for Frequency

Density, estimate of the mean)

* Once they are written down, you

dont need to worry about forgettingthem half-way through the exam.

* What else could you write down that

would be useful?

*


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* Skim through the paper to see what

types of questions there are (check

all pages!).

* You dont need to start at Q1, so

pick the questions in order of your

preference.

*


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* When tackling a question, underline

important parts of the question.

* Re-read the question again to make

sure you are going to answer it

correctly.

* What is the question actually

asking?

* Which pieces of information are

key?

*


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* Show your working out and make

sure it is clear by adding in key

words (LQ=, UQ=, Median=, angle

per adult=, Total cost=, etc.).

* By annotating your working, it

makes it easier for you to double

check your working.

*


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* Aim to spend no more than a

minute for every mark in aquestion.

* There are 60 marks in the paperand you have 75 minutes for theexam.

* The remaining time can be spentrechecking your working out.

*


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*

*Try and get a good nights sleep.

*Do have breakfast in the morning you willneed the energy.

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Unit 1 Exam Prep

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