Recent content by vanitymdl

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    A What is first and Second order Dependence?

    Can someone please explain to me what it means what they say a model is "first and second order dependence?"
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    A What do significant autoregressive coefficients mean?

    To go into a little bit of detail I am creating a coincident business cycle based on the Stock and Watson Methodology. The model includes 4 main indicators (employment, unemployment, wages and retail sales). On that end, I included autoregressive terms for each indicator so I am including...
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    A What do significant autoregressive coefficients mean?

    I am building a business cycle index, which include 4 variables that drive the index. Each variable I also include autoregessive coefficients that are all significant and negative. I was wondering what is the significance of this? In other words, what is the significance of have autoregessive...
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    Testing of two means

    They are predicted values from a regression. The thing is that the means are the same giving me a zero t-test. Can that happen? The reason I rejected the null hypothesis is because that is still less than the critical point
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    Testing of two means

    Y: 51 32 30 74 42 35 39 33 55 61 Y-hat: 49 35 29 72 44 32 38 36 57 60 Null hypothesis: mean y-hat = mean y Alternative hypothesis: not null hypothesis So I got as a t test 0 and I was wondering if I did something wrong because I never has this case happened to me.
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    Magnetic forces and particle of mass

    A particle with mass 1.81×10−3kg and a charge of 1.22×10−8C has, at a given instant, a velocity v =(3.00×104m/s)j^. produced by a uniform magnetic field B =(1.63T)i^+(0.980T)j^ Find the value of the expression qvB/m (the magnitude of a when v is perpendicular to B ), where q is the magnitude...
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    Magnitude and direction of Electric field

    So should i just subtract 51.8 from 180 degrees?
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    Magnitude and direction of Electric field

    Homework Statement Calculate the magnitude of the electric field E = (-11i^+14j^)N/C ∣∣E⃗ ∣∣ = _______ N/C Calculate the direction (relative to the +x-axis ) of the electric field E = (-11i^+14j^)N/C. θ =_________∘ counterclockwise from the +x-axis Homework Equations...
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    Book push Forces problem

    So I was in the right track? I just need to change my formula to 2.17cos(59) + Fsin(θ) = mg
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    Book push Forces problem

    Homework Statement A 0.407 kg book rests at an angle against one side of a bookshelf. The magnitude and direction of the total force exerted on the book by the left side of the bookshelf are given by: Force Left = 2.17 Newtons and θ=59 degrees What must the magnitude and direction of...
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    Newton's Laws direction and acceleration

    I think I might have made sense with it so i just use my original forces to find the acceleration. So .405N/0.25kg=1.62m/s^2 and for the second case 0.565N/0.245kg=2.26 m/s^s
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    Newton's Laws direction and acceleration

    Okay well thank you anyway, I'm getting more confused as we keep talking about it.
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    Newton's Laws direction and acceleration

    Okay, I'm still a little lost how this relates to the question. If direction of the force is parallel to the direction of the acceleration wouldn't they cancel out though? one would be in a negative direction and one in the positive
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    Newton's Laws direction and acceleration

    So they are parallel vectors
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