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# GCSE: Miscellaneous

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• Marked by Teachers essays 1
1. ## GCSE Maths questions

• Develop your confidence and skills in GCSE Maths using our free interactive questions with teacher feedback to guide you at every stage.
• Level: GCSE
• Questions: 75
2. ## Reaction Times

I decided that I would show the data I collected for the control first in a steam and leaf diagram and then present it in a line graph. Data collection This graph simply shows my control data- how ever I do not believe that this data is free from bias because it falls into the time frame for the evening so I could have just used this data for my experiment by using this as the results for the evening.

• Word count: 920
3. ## IGCSE Modeling Project bouncing ball

= P (x�-nx-mx+mn) = P (x�+x(-n-m)+mn) This formula will turn to a quadratic formula after solving it, and then it would be the equation for the parabola. For example for the second parabola if you plot in the lowest and highest X coordinate in the bounce it should come out like this: = P (x-6) (x-12) Then if you solve the equation it should turn out like: y= P (x�-18x+72) Value P basically is the value that influence the curve so it's a very important value in this equation.

• Word count: 656
4. ## This is my GCSE data-handling project, throughout which I will be discussing the topic of how sleep deprivation affects the reaction and ability to estimate a minute.

Below I will describe the method I will use for all subjects. To perform this experiment I will use a reaction timer. The tester will hold the ruler, and whilst standing ask the subject to put their thumb and first finger over the bottom of the reaction timer. To ensure all subjects have their fingers the same distance away from the ruler, I will turn the ruler sideways and ask the subjects to leave their fingers at the same width as the ruler when it is turned sideways.

• Word count: 940
5. ## The decimal search

x -2.0 -1.5 -1.0 -0.5 0 0.5 1.0 1.5 2.0 f(x) -0.5 0.625 0.5 -0.125 -0.5 0.125 2.5 7.375 15.5 As the curve crosses the x axis, the value of the function f(x) changes sign, for example: The values of f(x) in the table above confirms there are roots between [-2,-1.5] [-1,-0.5] and [0, 0.5]. I am going to concentrate on finding a more accurate value of the root between [-2,-1.5]. I will achieve this by reducing the size of the intervals to a width of 0.1. The graph and table below show that the root is between [-1.8,-1.9].

• Word count: 717
6. ## Fixed Point Iteration

Let x1 = 8. I will use the following equation: Xr+1 = g (xr) The table below shows the iterations. x = g(x) X1 8 8.960279 X2 8.960279 8.903599 X3 8.903599 8.906772 X4 8.906772 8.906594 X5 8.906594 8.906604 X6 8.906604 8.906603 X7 8.906603 8.906604 X8 8.906604 8.906604 X9 8.906604 8.906604 X10 8.906604 8.906604 The rearrangement of 1/2lnx + x - 10 = 0 to x = 10 - 1/2lnx converged to the root 8.906604 because the gradient was not too steep in that region.

• Word count: 546
7. ## Maths Mice Coursework

I will start of by put the mice into groups. By doing this it will save me a lot of time and make my data my easier to compare. Also grouping the data enables me to draw the graphs which help me to compare the data. After I group the data I will also find the mean average for both sets of mice. Female Groups Frequency (f) Midpoint (X) f x X 0 ? w < 5 5 ? w < 10 10 ? w < 15 15 ?

• Word count: 539
8. ## To test my hypothesis, I will use primary data. I will collect information from same houses in Mepton Bridge. I will compare Mepton Bridge to the whole country using secondary data.

Plan of Action To test my hypothesis, I will use primary data. I will collect information from same houses in Mepton Bridge. I will compare Mepton Bridge to the whole country using secondary data. I will count people who are less than seventeen years old as children. Because the town is too big to fid out the number of children in every house, I have decided to choose five streets at random from the 876 streets on the list on the A-Z map of Mapton Bridge.

• Word count: 520
9. ## Data handling. There are many different ways of collecting data. A common method of collecting data is to use a questionnaire.

The person interviewing is likely to be more consistent at recording the responses. Disadvantages This method of interviewing takes a long time and might be expensive than other data collection methods. The interviewed person is more likely to refuse answering the question or they might lie if they give an answer. Questionnaires can also include: yes or no answers ticking boxes numbered responses word responses questions which require a sentence to be written Whichever style of question is used, it is important that they are easy to understand, cover every possible answer, are unbiased and unambiguous. It is also important that you ensure that they are appropriate to your survey.

• Word count: 586