Test yourself unit 1 foundation qs

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    25-Dec-2014

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  • UnitOne

  • Mean Average

    3, 5, 2, 6

    = 3 + 5 + 2 + 6 = 5.75 4

  • Mode

    4,5,3,2,4,6,1Most common or highest frequency= 4

  • Median

    7, 5, 2, 6, 3, 42, 3, 4, 5, 6 ,7= 4.5

  • Estimate of a Mean mid-points x frequency frequency

  • ProbabilityAlways adds up to 100.510.250.75

  • Pie chartsTo find the angles

    360 total frequency

    X by individual frequencies

  • The RangeLargest value smallest value

    3, 5, 6, 9, 12

    12 - 3 = 9

  • CorrelationPositiveNegativeNonexxxxxxxx

  • Line of best fitDraw a line through 2 points Half the crosses either side of line Make sure the line follows the trend

  • To add and subtract fractions

    the denominators must be the same

  • Rounding37685 To the nearest 10 . . 37690 To the nearest 100 . . 37700

    To the nearest 1000 . . 38000

  • BiDMASThe order of operationsBracketsIndicesDivisionMultiplicationAdditionSubtraction

  • To multiply fractions we multiply

    top x topbottom x bottom

  • Simplify Ratios4:10 = 2:5 2:7 = 2:7 125: 500 = 25:100 = 5:20 = 1:4

  • Sharing in RatiosShare 600 in the ratio 3:4:5 3+4+5 = 12

    600 12 = 50So 3x 50 = 150 4x50 = 200 5 x 50 = 250150:200:250

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