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Math Help - scatter diagram and Probability

  1. #1
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    scatter diagram and Probability

    Please solve following.
    Q#1. The owner of a retailing organization is interested in the relationship between price at which a commodity is offer for sale and the quantity sold. The following sample data have been collected.
    Price
    25
    45
    30
    50
    35
    40
    65
    75
    70
    60
    Quantity
    118
    105
    112
    100
    111
    108
    95
    88
    91
    96

    Price: 25,45,30,50,35,40,65,75,70,60
    Quantity: 118,105,112,100,111,108,95,88,91,96. respectively

    a)Plot a scatter diagram for the above data.
    b)Using the method of least squares, determine the equation for the estimated regression line .Plot this line on the scatter diagram.
    c)Also discuss the regression line.
    d)Calculate the standard deviation of regression Sy.x.



    Q#2:
    Two dice are caste: A1 is the event that a 6 appears on at least one die, A2 is the event that a 5 appears on exactly one die and A3 is the event that same number appears on both dice.
    • Are A1 and A2 independent?
    • Are A2 and A3 independent?
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  2. #2
    MHF Contributor
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    I think you'll have to help out a bit. Do you have a book? What sort of background do you have that would bring you to having been assigned these problems?
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  3. #3
    Newbie
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    Smile yes

    Yes i have got a book. I am the student of BBA. Please solve Q#2. I will solve Q#1.
    Thanks alot.
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  4. #4
    Grand Panjandrum
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    Quote Originally Posted by nisoo-1 View Post
    Please solve following.
    Q#2:
    Two dice are caste: A1 is the event that a 6 appears on at least one die, A2 is the event that a 5 appears on exactly one die and A3 is the event that same number appears on both dice.
    • Are A1 and A2 independent?
    • Are A2 and A3 independent?

    To show that two events are independent you need to show that:

    <br />
P(A \wedge B)=P(A)~P(B)<br />

    RonL
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