• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month
Page
1. 1
1
2. 2
2
3. 3
3
4. 4
4

# 'The Average Length of a Sample of 52 Randomly Selected Films'.

Extracts from this document...

Introduction

## Statistics Coursework 1

Statistics Coursework 1

The title of my investigation is 'The Average Length of a Sample of 52 Randomly Selected Films'. As you can interpret from this title, I am going to investigate into the length of a set of randomly selected feature length films. I have chosen to investigate into this topic because I am a Film Studies student and am required by this subject to produce a feature length film as part of a coursework assignment. This leaves me with the predicament of trying to decide how long my feature film should be. Is there a certain length of film that after the audience has finished watching, they feel that they have not got their money's worth and in consequence leave the cinema feeling disappointed? In contrast, is there a certain length of film that after the audience has finished watching, they are bored because the film has run on for too long? In short, my aim for this investigation is to find the average length of feature films and so enable me to correctly decide the length of my Film Studies coursework film so that the audience leaves happy after viewing it.

To determine a population for my course-work, I am going to use the HMV superstore Internet site to search for my sample of films.

Middle

190

200

210

3

N = 52 156 6 represents 156 mins.

Stem and Leaf diagram showing the total duration of a sample of 52 films (unsorted)

To help me when constructing a

Conclusion

 Graph Value My calculated value Computer value Mean 233.5 236.004 Standard Deviation 51.08 55.85029 Median 258 mode 202.2

As you can see, the only real discrepancy occurs with the computer's standard deviation, and I can only conclude that this is because it has used a mean with more decimal places, and therefore it is more accurate. It also occurred because the calculated standard deviation was found from grouped data and therefore only an estimate. Graph discrepancies occur because of inaccurate drawing techniques. Other than that, my values are, on the whole, pretty accurate.

The quality of the investigation could be improved by using a more varied population, in an ideal world this would be an Internet site of every film ever made. As this does not exist, the site that contains the most comprehensive list of films will have to do. Which in this case is the site that I used, the HMV superstore site. My method of collection would not vary even if I used another site. If I used three randomly picked numbers for each category, then I would end up with a sample of 78 films, which I think is too produce an accurate report on.

I think that this investigation was a success, as it helped me to gain some information that will help me in another topic, and because it was completed as accurately as I could.

This student written piece of work is one of many that can be found in our AS and A Level Probability & Statistics section.

## Found what you're looking for?

• Start learning 29% faster today
• 150,000+ documents available
• Just £6.99 a month

Not the one? Search for your essay title...
• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month

# Related AS and A Level Probability & Statistics essays

1. ## Statistics coursework

4 12 7 Male 104 5 4 4 13 7 Male 109 5 5 5 15 7 Male 107 5 5 5 15 7 Male 103 5 4 4 13 7 Male 110 5 5 5 15 7 Male 103 4 5 5 14 7 Male 100 4 4 4

2. ## Investigating the Relationship Between the Amount of Money a Football Club Receives and its ...

30 19 9 6 8 35 37 77 22000 �1,800,000 9 1 WBA 12 46 12 4 7 43 33 4 7 12 26 43 59 25396 �2,000,000 -7 1 Wolves 7 46 11 10 2 37 19 8 6 9 27 24 73 28525 �1,750,000 21 2 Blackpool 14

1. ## Standard addition was used to accurately quantify for quinine in an unknown urine sample ...

As can be seen from the structure of quinine (fig.1), quinine is a polycyclic aromatic compound and as such, quinine can be estimated by fluorescence spectroscopy at levels as low as 0.1�g/cm3 Changes in the system pH, if it has an effect on the charge status of the chromaphore, may influence pH.

2. ## Guestimate - investigate how well people estimate the length of lines and the size ...

The graph I have chosen to take further is the graph for angle 2, as the IQR is the same for both years. This is my table for my histogram. As you can see it has unequal class widths, otherwise it wouldn't be a histogram.

1. ## Design an investigation to see if there is a significant relationship between the number ...

Another reason for the Fucus vesiculosus having longer fronds at lower shore can be explained by considering the competition in both areas. The lower shore is the area of Robin Hood's Bay that is uncovered for the shortest amount of time.

2. ## Statistics Coursework

It would be unreasonable and difficult for me to use all of the data given, as it will consume a lot of time during the calculation process. Because of this I've decided to use the stratified sampling method to handle the vast amount of data.

1. ## &amp;quot;The lengths of lines are easier to guess than angles. Also, that year 11's ...

The mean percentage error is worked out by dividing the total percentage error by how many pieces of data there are. So, for the mean of the year 9 line errors, the calculation would be 143.48/27 which equals 5.31%. This is quite a low percentage of error which means that the year 9's were quite good at estimating the line.

2. ## ECOLOGY ASSIGNMENT

This would also work in reverse if hedgebank A soil was less acidic and Geranium robertianum preferred more acidic soil. Climatic factors such as water, temperature, light and wind could also affect distribution. As light is very important for growth of a plant populations it could affect Geranium robertianum if

• Over 160,000 pieces
of student written work
• Annotated by
experienced teachers
• Ideas and feedback to