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

Do Left and right-handed people have roughly the same reaction time with their dominant hand.

Extracts from this document...


Hypothesis 1 I predict that left and right-handed people will have roughly the same reaction time with their dominant hand. Plan In order to prove my hypothesis I am going to use stratified random sampling, so that I get a fair sample to conduct my study. I will find both the average and the range to see if my hypothesis is correct. Stratified Random Sampling I am going to use 30 pieces of data for my sample. I sorted the data excluding any that did not say what hand they used or used both hands as their dominant. Firstly I must find the ratio of left handed people to right: There are 300 pieces of data in total. There are 32 left handed people. And 268 right handed people. In order to find the ratio I have to divide the number of left handed people with the total number of people, and then I have to multiply the answer by 30. I have to do the same to the right. Left= 32 / 300 x 30 = 3.2 Right=268 / 300 x 30 = 26.8 The ratio is 3.2 : 26.8 (left : right) ...read more.


0.50 seconds 0.25 seconds 0.25 seconds 0.39 seconds 0.28 seconds 0.25 seconds 0.47 seconds 0.24 seconds 0.41 seconds 0.22 seconds 0.31 seconds 0.20 seconds 0.39 seconds 0.27 seconds 0.29 seconds 0.25 seconds 0.33 seconds To find the total average for the left / right hand you have to add up all your results and divide by number of results. Total left hand = 1.18/3 = 0.39 Total right hand =7.41/27 =0.27 From this I can see that right handed people have a quicker reaction time with there dominant hand than left handed people do. Range To find the range between the total right hand and the total left I must take the smallest one away from the biggest. Range = 0.39-0.27 =0.12 Although right handed people have quicker reaction times than left handed people do, it is not by much, there is only 12 hundredths between them. Conclusion From my study I can conclude that right-handed people are faster than left. But I think that my hypothesis is correct because I predicted that "left and right-handed people would have roughly the same reaction time with their dominant hand" and the difference between them is only 12 hundredths of a second. ...read more.


My Random samples are : Left hand average Right hand average 0.32 0.57 1.04 0.36 0.95 0.25 0.40 0.31 0.50 0.33 0.30 0.33 0.33 0.33 0.31 0.38 0.39 0.33 0.36 0.33 0.22 0.19 0.28 0.28 0.33 0.36 0.33 0.28 0.22 0.25 0.28 0.25 0.33 0.33 0.27 0.41 0.33 0.39 0.39 0.3 0.88 0.69 0.25 0.44 0.25 0.41 0.22 0.18 0.62 0.273333333 0.24 0.253333333 0.28 0.5 0.28 0.25 0.22 0.25 0.28 0.33 0.31 0.296666667 0.28 0.24 0.27 0.22 0.29 0.253333333 0.31 0.276666667 0.22 0.18 0.22 0.22 0.23 0.203333333 0.64 0.2 0.29 0.293333333 0.28 0.25 0.31 0.29 0.27 0.22 0.31 0.28 0.14 0.27 0.31 0.39 0.27 0.27 0.89 0.49 0.23 0.22 Scatter Graph From my graph I can see that there is little correlation. Although after looking at it for a little while I have come to the conclusion that you can see the majority of the points that are quick with there left hand are also quick with there right, but there are still a number of exceptions. Conclusion I have come to the conclusion that my hypothesis is not fully correct although, I can see that for the majority it is (the majority being roughly 60%) that it is correct. Key / = divide ?? ?? ?? ?? ...read more.

The above preview is unformatted text

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. Probability of Poker Hands

    for the five cards and therefore, we must eliminate the possibility of getting the straight with the same suite. There are 40 ways of getting a straight flush. Choosing a Flush (all cards from the same suit): The possibility of getting a flush can be represented by 4C1 x 13C5.

  2. I am going to design and then carry out an experiment to test people's ...

    To work out which values are outliers, I must find the interquartile range and multiply it by 1.5 (call this value f ). Outliers lie between f to the left of the lower quartile and f to the right of the upper quartile.

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

    I will then draw a line of best fit on each scatter diagram in order to able to estimate the prices of others cars, as the line of best fit will show the trend in the second hand price of the cars against each of the factors.

  2. "The lengths of lines are easier to guess than angles. Also, that year 11's ...

    Firstly, I drew some grouped frequency tables. From these I was able to see that for the year 9's, the mean for the estimate of the lines from the grouped frequency table was 5.21cm, this is 0.61cm longer than the actual length of the line, yet the mean for the

  1. find out if there is a connection between people's IQ and their average KS2 ...

    the maths, english and science results were rounded up to a whole number. I had to find the average of the three results to make my data little more spread out and accurate for the whole picture. Because I calculated the average, the scores were divided by three (for the subjects)

  2. I want to find out if there is a connection between people's IQ and ...

    Pearsons Product Moment Correlation Coefficient (Pearsons) and Spearmans Rank Correlation Coefficient (Spearmans). Pearsons takes all the points on the graph and measures how far away from the trendline they are. It measures both ways from the trendline, horizontally and vertically, Average KS2 SATs results and IQ.

  1. Case study -Super Savers is wishing to move into the UK Food Retail market.

    According to Stone and Sidel (1993, p.152), "the triangle test, as its name implies, is a three-product test in which all three products are coded and the subject's task is to determine which one is most different from the order two".

  2. Factors that most affect the prices of second hand cars

    I realised this after I had completed my first graph, in this graph I compared the decrease in price and the age and this is what the results showed: As you can see these results are not accurate at all, it does not demonstrate my point clearly at all and I then decided to do the percentage decrease.

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