• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month


Extracts from this document...





  1. My hypotheses are that boys are taller than girls in year 10.
  2. Boys weigh more than girls in Year 10.


The reason for my first hypotheses is that girl enter puberty quicker than boys so for this reason girls growth spurt is earlier on in girls than it is on in boys, but in the later years boys tend to catch up to the girl and in majority cases they outgrow them.

The reason for my second hypotheses is that girls at a younger age make more fat as it is needed because of the way the girls has developed. She needs this fat because her body is getting ready top bear children.

...read more.


Systematic sampling: If a sample of size t is to be taken from the population of size u then every t/u member of the population is to be tested. Every member of the sample is chosen at regular intervals from the list. A sample chosen in this way can be biased if low or high values come in a certain pattern. The starting point is chosen randomly.

In order to test, my hypotheses I must take a sample from across a range of years. This is because the sample of year 7’s must be in proportion o the size of the whole school.

My stratified sample (males)

...read more.


Quota sampling: This is a sample where they try to involve as much of the population as possible. It is a method often used by research companies. The interviewer will normally be given instructions but they then will be left to choose the interviewees.

Attribute sampling: In this type of sampling you would pick your sample based in an attribute which is totally unrelated to the variable being investigated.  


I will choose to use random sampling and stratified sampling because these will make the results less biased as possible and the stratified sampling will give us the exact of people we need to use.

...read more.

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

See related essaysSee related essays

Related AS and A Level Probability & Statistics essays

  1. Marked by a teacher

    The heights of 16-18 year old young adults varies between males and females. My ...

    5 star(s)

    7.071 µ = 70.1 ± 2.5758 x 0.432 µ = 70.1 ± 1.113 µ is in the interval [ 68.99 , 71.21 ] 68.99 < x < 71.21 A 90% confidence interval for the height of males aged 16-18 = 70.1 S² = 9.13 n = 50 ?

  2. Used Cars - What main factor that affects the price of a second hand ...

    Conclusion After looking at the sample of data in many different ways I can now come to a conclusion about my findings and if the hypothesises at the start was correct or not. My hypothesis which stated that mileage was the main factor that affected the price of a second

  1. Statistics Coursework

    This way, it does not only reduce the amount of time for me to process the data, it also reduces its quantity. The attendance figures of all of the students will be divided according to the year groups they belong to in ascending order (0% - 100%).

  2. AS statistics coursework - correlation coefficient between height and weight in year 11 boys ...

    The girls did have a weaker correlation however it was larger than 0.15 which could be put down to the sample not being greatly respective of the entire year group. 3. I think that the boys will have an overall lower residual range.

  1. Statistics coursework

    This is for the same reasons as I used the same type of graph in the first part of my investigation. As before, I will use a box and whisker to show the same data as on the graph but with extremes being made obvious.


    Weight(kg) 1.8 42 1.8 74 1.65 48 1.7 55 1.65 45 1.64 45 1.72 53 1.57 51 1.53 48 1.62 51 1.55 40 1.7 53 1.43 45 1.68 48 1.7 60 1.63 60 1.43 48 1.47 47 1.6 70 1.59 64 1.35 29 1.54 60 1.6 55 1.7 50

  1. Intermediate Maths Driving Test Coursework

    this would make you think that there must be some pupils that had the most lessons are the one who aren't as good at driving and so need to take more lessons and so make a lot of mistakes. Perhaps it is females who are obscuring this fact and males

  2. maths coursework sampling

    * Hypothesis 3 Boys are better at estimating length A than girls. Once the samples are finalised, I will analyse the data by drawing, scatter graph, box plots and frequency polygon etc. In many cases, it can be possible for outliers to appear with extreme values or anomalies.

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