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• Level: GCSE
• Subject: Maths
• Word count: 1304

# mathematics coursework

Extracts from this document...

Introduction

By Gina smith

###### AIM

To investigate which battery , IC Fuel or Powerbat, last longer and if temperature or light effects them. Then choose which battery will be better for space travel.

INTRODUCTION

Statistics are used in everyday life. They are used for pricing items in a shop, working out how many people live in England or even working out which day the bin man will come to pick up your rubbish!

Frequency is the ratio of the number of times an event occurs in a series of trials

###### METHOD

I will use many different methods to determine which battery will last longer. I’ve decided to use random sampling to get a better and interesting spread of results. I will randomly sample the results using  a computer program. I

Middle

17

47

67

88

94

100

## 1127

100

To work out the range subtract the highest mid point from the lowest mid point.

To work out the mean average of Powerbat battery life I can divided the total of the XF column by the total of the FREQUENCY column.

Cumulative Frequency Graph

##### Foreign Factors

Foreign factors are factors which may effect the results of the investigation. In my investigation the foreign factors are temperature  and light reading of the labs which the investigation was conducted in.

#### IC Fuel

 LAB 1 TEMP - 8 LIGHT - 1.1 IC FUEL LIFE(HOURS) 4.5 8.4 12 14.5 7 6.2 4.5 8.9 5.3 13.7 3.2 1.6 9.4 9.8 10.2 4.2 9.1 10.4 12.5 4.3 Total  = 159.7 LAB 2 TEMP-11 LIGHT-5.4 IC FUEL

Conclusion

13.9

13.9

14.5

12.8

12.7

12.9

12.8

12.9

9.6

9.9

14.9

14.5

13.7

13.9

14.5

14.2

14.1

13.9

12.6

13.8

Total =265.7

These graphs show if foreign factors effect battery life. From the graph we can determine that temperature does have an effect because the correlation is positive.

We can also determine that light reading has no effect on battery life because there is no correlation.

CONCLUSION

In conclusion Powerbat is more reliable for space adventures such as UKSA’s. I think this because there are less rouge results. In space if you happen to have a fuel cell which could have allow rogue result you could be in serious danger. Not only has Powerbat more reliable, it has  a higher mean average . This means that its life hours are higher. IC Fuel has a mean average of 10.69 but this is bad I comparison to  Powerbat’s average of 11.27. Although they are both effected by foreign factors Powerbat is the obvious battery to use because of its reliability and longer life hours

By Trent Williams-Jones

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