Regression - Reliability of a prediction : ExamSolutions Maths Revision

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  • Опубліковано 22 гру 2024

КОМЕНТАРІ • 30

  • @chubbins7352
    @chubbins7352 9 років тому +27

    Thank god, last video! just spent 4 hours going through this whole playlist!

  • @ExamSolutions_Maths
    @ExamSolutions_Maths  11 років тому +2

    At some point during this academic year, yes.

  • @ivajlonaumov6499
    @ivajlonaumov6499 7 років тому +2

    Thank you very much. Fantastic : simple,logic and clear

  • @SilosMOVIE
    @SilosMOVIE 9 років тому +8

    But the line y=29.0+3.9x, we are supposed to calculate it using the table right??

    • @umerkk96
      @umerkk96 9 років тому

      SilosMOVIE yes

  • @aceon700
    @aceon700 5 років тому +1

    thank you for this it has helped so much

  • @robertrey7002
    @robertrey7002 11 років тому +2

    hey man! your video are awesome, they've really helped me! Are you going to do FP3 for Edexcel? Take care

  • @2PACSOLIDER
    @2PACSOLIDER 9 років тому +2

    I tried calculating the regression line however i got y = 117.8 + 4.84x. i know that b = Sxy/Sxx and a = mean of y +bmeanx. i used these values: Sigmax = 96, Sigmay = 704, Sigmaxy = 8354 sigma x^2 = 1252. What am I doing wrong?? How did you get that equation?

    • @fragfeen3697
      @fragfeen3697 8 років тому +1

      Because your values are wrong, sigmax = 106, sigmay=704, sigmaxy= 8354, sigmax^2 = 1352. Try it with these values, you should get the correct answer.

  • @killer2434
    @killer2434 8 років тому +1

    when you say 19 is close to the highest value of x that makes it reasonably reliable. what if you say its extrapolated therefore its unreliable? would you still be right?

  • @chrisbirch6513
    @chrisbirch6513 7 років тому +6

    It's almost 11pm. Enough said.

    • @devine7881
      @devine7881 7 років тому

      Devil's Den 5am now :) #lastminutereviserstrugless been watching these videos whole night😂😂

    • @rbofpeckham4938
      @rbofpeckham4938 7 років тому

      I'm Amazing good luck

    • @NinjaDestruction
      @NinjaDestruction 7 років тому +1

      Chris Birch just got up no time to waste slept at 12

  • @Slimycat90
    @Slimycat90 11 років тому +1

    Great video... But is the line y=29.0+3.9x given in the question?

  • @tameraziz2104
    @tameraziz2104 7 років тому +1

    Thank you

  • @MONSTERDRINKK
    @MONSTERDRINKK 11 років тому +3

    Hey man I really appreciate these videos, I just started my Math A-Levels Edexcel.
    Also I am doing (biology,chemistry and physics).
    Might I ask what do you think is a good GCSE grades to get.
    I got the following
    Biology a
    chemistry a
    physics a
    maths b
    English language/ literature/ igce b/b/b
    history b
    geography a
    business economics b
    BTEC business and PE distinction start and merit

  • @alanoudshammout3337
    @alanoudshammout3337 6 років тому

    these videos were so helpful, thanks, A LOTTT

    • @ExamSolutions_Maths
      @ExamSolutions_Maths  6 років тому

      You're welcome. Best wishes for tomorrow if you have a stats exam.

  • @qutianbo2071
    @qutianbo2071 5 років тому

    Sir, can I ask a question?
    My book tells me that the reliability o predictions are relevant to ( The number of data value is large) What does that mean? :)

  • @yashkalra7603
    @yashkalra7603 6 років тому +1

    nice😄

  • @ExamSolutions_Maths
    @ExamSolutions_Maths  11 років тому +1

    Whoopee Doopee!

    • @tania7960
      @tania7960 7 років тому +1

      you are my fav person in the entire world

  • @JYGO1020
    @JYGO1020 11 років тому +1

    1st comment HA HA people