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

When covered by the sea certain abiotic factors, such as humidity and wind, which have an effect on the transpiration rate of algae, do not affect the seaweed. These abiotic factors could cause desiccation to occur, drying out the Fucus vesiculosus.

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

Both classes of substances have delocalised ?-electrons that can be placed in low-lying excited singlet states. In polycyclic aromatic systems where the number of ?-electrons available is greater than in benzene, these compounds and their derivatives are usually much more fluorescent than benzene and its derivatives.

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

E < 90 1 1 90 90 < E < 120 12 13 120 120 < E < 150 16 29 150 150 < E < 180 1 30 180 Frequency Table for Secondary data, angle 2, year 10 Length (cm)

1. ## Throughout this experiment I have decided that I am going to investigate the tensile ...

dislocations slip until the structure is perfect and there are no dislocations left. This is called slip. The elastic region of the graph, when presented individually, shows that the results are not actually very accurate. To investigate the actual accuracy of my results I used standard deviation.

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

For the angle it would be 721.21/27 which equals 26.71%. This percentage is so high because someone estimated 95�, which means that mean is made higher by this anomalous result. This shows that the year 9's were better at estimating the length of the line.

1. ## GCSE Mathematics Coursework: Statistics Project

* The boys' weights are spread over a larger range than the girls' weights. Box and Whisker Diagrams for the Average Amount of TV watched per Week For Boys and Girls: In the same method as before, the median, lower quartiles, upper quartiles and minimum and maximum values for the boys and girls were calculated using Excel formulae.

2. ## An Investigation Into An Aspect Of Human Variation.

Appendix 6-Graph 5 'A frequency distribution graph to compare the variation of hand span amongst males and females'. The two peaks display a normal distribution and indicate a divide between the sexes where males have bigger hands than females. Appendix 7-Graph 6 'A frequency distribution graph showing the variation of

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