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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. maths estimation coursework

    Also the age gap will help to determine if there is a connection between estimation and age as suggested in Patricia's data. I will take a sample of the population of year 8s and year 12s as the total number of year 8s and 12s is 226 pupils and is to large and would be too time consuming to work with. This sample taken from the estimating population shall be a stratified sample, and will be representative of the total estimating population.

    • Word count: 2224
  3. Data Handling

    Number of hours Each class took their pulse rate 5 times and found the average of the 5 results. The mean was then recorded. Each Year group that was doing the investigation went outside and ran for 4 minutes. Then each minute each person recorded his pulse rate for approximately 15 minutes. Then from this data the maths teachers worked out how many minutes it took for each persons pulse rate to return to its mean resting rate. This was all recorded on the same survey sheet. There was a few more questions to be answered on the sheet which were: 1.

    • Word count: 2742
  4. Data handling - calculating means and standard deviations

    160 166 131 131 124 120 154 118 139 133 166 119 159 148 128 167 154 133 130 165 164 120 123 152 167 149 133 122 167 127 137 123 130 160 136 147 148 125 118 118 152 * The mean () is calculated using the equation below: = * The standard deviation () is calculated using the equation below: = 17.08731661 Adding 'a' to a set of data will result in an increase in the mean ()

    • Word count: 2086
  5. Investigation into 100m times and long jump distances

    * The 100m times will improve over time throughout the year groups. * The 100m times will follow a normal distribution throughout the year groups. Plan For my first hypothesis, I will use a scatter graph to see if there is any relationship between the 100m times and the long jump distances. This will enable me to see if there is a correlation between the two. The correlation can be found by finding the double mean point, drawing a horizontal and a vertical line through it and examining the spread of data over the four quadrants.

    • Word count: 2849
  6. Math Investigative Task - calculating the value of metal used in coins.

    For ease of calculation, I will be taking it as 0.071 grams or 0.0015 pounds 4. Ed Yardeni claims that we should wait before we melt the pennies because the price will keep rising and the metals in the penny will be worth more than its face value. To prove this, I will calculate the value of metals before and after the zinc price raised up by $551 per ton. Before price hike: Copper: $5,690 per ton or $2.703410526 per pound Zinc: $2,930 per ton or $1.329025645 per pound Value of Copper in a pound of pennies: 0.025 x 2.703410526 = $0.067585263 Value of Zinc in a pound of pennies: 0.975 x 1.329025645 = $1.295800004 Total

    • Word count: 2711

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