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I intend to conduct an investigation involving two sets of variables (x and y) in order to see how they relate to each other.

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James Fletcher                                                                                        09 May 2003

Statistics 2 Coursework

Part 1 DESIGN:

I intend to conduct an investigation involving two sets of variables (x and y) in order to see how they relate to each other.  I will choose a topic and then collect data from a secondary source attempting to analyse the variables such that a conclusion may be met, in terms of correlation and regression; according to the coursework criteria.  A very important aspect to this investigation is that the two variables of data have the likelihood of affecting each other (or just x affecting y) whilst ensuring that any other factors remain either constant (and have little to no affect on these data sets), or ensuring that any other factors present can be taken account of (at least in the qualitative sense), so that the conclusion to these sets of data is both valid and meaningful.  In everyday terms, the investigation I intend to conduct will follow a practical and significant path.

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relatively abundant amongst the general public and show each set of data for the beginning of each month up until the end of 2001 (where it seems sources for this data cease to be recorded from after that date).  If there is a strong connection between these sets of data and If I can argue that there are no other apparent factors influencing category y (amount of smokers between aged 13 and 19 years), I may be able to show that the mobile phones successfully compete with cigarettes to meet certain important needs of teenagers.  

I have made the assumption that other

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After I make full analysis of the data I shall produce an appropriate hypothesis test in order to make a more accurate quantitative judgement on the issue.

I will try to explain any anomalous results by looking at when they occurred and any possible factors which may have resulted in their presence.

The following is a table of results showing the number of mobile phones owned by teenagers and the number of smokers of the same age group.  

They are from secondary, independent sources and consist of a random sample of teenagers varying across the UK using quota sampling.  The cross section of teenagers should therefore be representative of the teenage population in the UK.  The sources are of a standard such that they are likely to be very accurate, unbiased and relaible.

[Sources:  The British Medical Journal, Office of Fair trading for TELecommunications (OFTEL) statistics.]

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