All that I need to explain how we get 0.44725 in Part (f)
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All that I need to explain how we get 0.44725 in Part (f) (i) Obtain the expected values of X and Y E(X)-0.29; E(Y)-0.2...
Question 2. Suppose (X.,X) . FXY, for i = 1, , n. We collect sample data for n-100, obtain sz-2 and Sy-1, and would like to test H0 : Var(x)-Var(y) versus HA : Var(z) Var(y). (a) Using the F test, wh...
Question 2. Suppose (X.,X) . FXY, for i = 1, , n. We collect sample data for n-100, obtain sz-2 and Sy-1, and would like to test H0 : Var(x)-Var(y) versus HA : Var(z) Var(y). (a) Using the F test, what is the observed statistic? (b) Derive the null distribution and write out the p-value.
Question 2. Suppose (X.,X) . FXY, for i = 1, , n. We collect sample data for n-100, obtain sz-2 and Sy-1, and would like...
e. Consider the multiple regression model y X 3+E. with E(e)-0 and var (e) ơ21 Assume that ε ~ N(0 σ21), when we test the hypothesis Ho : βί-0 against Ha : βί 0 we use the t statistic with n-k-1 degr...
e. Consider the multiple regression model y X 3+E. with E(e)-0 and var (e) ơ21 Assume that ε ~ N(0 σ21), when we test the hypothesis Ho : βί-0 against Ha : βί 0 we use the t statistic with n-k-1 degrees of freedom. When Ho is not true find the expected value and variance of the test onsider the genera -~ 0 gains 0 1S not true find the expected value and variance of the test statistic.
e. Consider...
part iii and iv Exercise 3 (Paired test, known variance of the difference). Let X, Y...
part iii and iv
Exercise 3 (Paired test, known variance of the difference). Let X, Y be RVs. Denote E[X] = Hx and E[Y] = My. Suppose we want to test the null hypothesis Houx = uy against the alternative hy- pothesis H :Mx My. Suppose we have i.i.d. pairs (X1,Y),...,(Xn, Yn) from the joint distribution of (X,Y). Further assume that we know the value of o2 = Var(X-Y). (i) Noting that X1 - Y1,...,xn - Yn are i.i.d. with...
FR2 (4+4+4 12 points) (a) Let XI, X2, X10 be a randoin sample from N(μι,σ?) and Yi, Y2, 10 , Y 15 be a random sample from N (μ2, σ2), where all parameters are unknown. Sup- pose Σ 1 (Xi X 2 0 321 (Y-...
FR2 (4+4+4 12 points) (a) Let XI, X2, X10 be a randoin sample from N(μι,σ?) and Yi, Y2, 10 , Y 15 be a random sample from N (μ2, σ2), where all parameters are unknown. Sup- pose Σ 1 (Xi X 2 0 321 (Y-Y )2-100. obtain a 99% confidence interval for σ of having the form b, 0o) for some number b (No derivation needed). (b) 60 random points are selected from the unit interval (r:0 . We want...
Hi all the answers are given on this worksheet I just need to know how to do part (e) and calcula...
Hi all the answers are given on this worksheet I just need to
know how to do part (e) and calculate the two numbers in my TI-84.
(I use my TI-84 to get z and p-value)
Problem 4: Two Proportions In 1995, the American Cancer Society randomly sampled 1500 adults of which 555 smoked. In 2005, they surveyed 1730 adults and ound that 578 of them smoked. At the 5% level of significance test the claim that the proportion of...
Given X, and x, distributions that are normal or approximately normal with unknown o, and on,...
Given X, and x, distributions that are normal or approximately normal with unknown o, and on, the value of t corresponding to X, - X, has a distribution that is approximated by a Student's t distribution. We use the convention that the degrees of freedom is approximately the smaller of n - 1 and n, - 1. However, a more accurate estimate for the appropriate degrees of freedom is given by Satterthwaite's formula: 2 2 xn2 522 +$22) d.f. z...
Hello, Q1: where does the f(1,17) the 1 come from? Q2, how do i get the...
Hello,
Q1: where does the f(1,17) the 1 come from?
Q2, how do i get the second equation from the first
equation?
thanks
Heat treating is often used to carburize metal parts such as gears. The thickness of the carburized layer is considered an important feature of the gear, and it contributes to the overall reliability of the part. Because of the critical nature of this feature, a lab test is performed on each furnace load. The test is a...
It's a multi part question set - if you can't finish all of it, that's ok!...
It's a multi part question set - if you can't finish all of
it, that's ok! I would just really appreciate any and all help as
soon as possible, will give thumbs up, thank you so much in
advance!
Thank you!! Inventory management There are 13 questions in this set As you proceed through these questions, use necessary information from previous questions. Walzon recently made changes to its inventory management and delivery systems. Walzon wants to know whether these changes...
It's a multi part question set - if you can't finish all of it, that's ok!...
It's a multi part question set - if you can't finish all of it,
that's ok! I would just really appreciate any and all help as soon
as possible, will give thumbs up, thank you so much in advance!
Here are more clear photos, help is really needed on the last
three questions if you can't do all of it, thank you in
advance!
IS 25 1) CL E) 10) (이 13) Thank you!! Inventory management There are 13 questions...
Need help with stats true or false questions Decide (with short explanations) whether the following statements are true or false a) We consider the model y-Ao +A(z) +E. Let (-0.01, 1.5) be a 95% con...
Need help with stats true or false questions
Decide (with short explanations) whether the following statements are true or false a) We consider the model y-Ao +A(z) +E. Let (-0.01, 1.5) be a 95% confidence interval for A In this case, a t-test with significance level 1% rejects the null hypothesis Ho : A-0 against a two sided alternative. b) Complicated models with a lot of parameters are better for prediction then simple models with just a few parameters c)...
Question 2. Suppose (X.,X) . FXY, for i = 1, , n. We collect sample data for n-100, obtain sz-2 and Sy-1, and would like to test H0 : Var(x)-Var(y) versus HA : Var(z) Var(y). (a) Using the F test, what is the observed statistic? (b) Derive the null distribution and write out the p-value.
Question 2. Suppose (X.,X) . FXY, for i = 1, , n. We collect sample data for n-100, obtain sz-2 and Sy-1, and would like...
e. Consider the multiple regression model y X 3+E. with E(e)-0 and var (e) ơ21 Assume that ε ~ N(0 σ21), when we test the hypothesis Ho : βί-0 against Ha : βί 0 we use the t statistic with n-k-1 degrees of freedom. When Ho is not true find the expected value and variance of the test onsider the genera -~ 0 gains 0 1S not true find the expected value and variance of the test statistic.
e. Consider...
part iii and iv
Exercise 3 (Paired test, known variance of the difference). Let X, Y be RVs. Denote E[X] = Hx and E[Y] = My. Suppose we want to test the null hypothesis Houx = uy against the alternative hy- pothesis H :Mx My. Suppose we have i.i.d. pairs (X1,Y),...,(Xn, Yn) from the joint distribution of (X,Y). Further assume that we know the value of o2 = Var(X-Y). (i) Noting that X1 - Y1,...,xn - Yn are i.i.d. with...
FR2 (4+4+4 12 points) (a) Let XI, X2, X10 be a randoin sample from N(μι,σ?) and Yi, Y2, 10 , Y 15 be a random sample from N (μ2, σ2), where all parameters are unknown. Sup- pose Σ 1 (Xi X 2 0 321 (Y-Y )2-100. obtain a 99% confidence interval for σ of having the form b, 0o) for some number b (No derivation needed). (b) 60 random points are selected from the unit interval (r:0 . We want...
Hi all the answers are given on this worksheet I just need to
know how to do part (e) and calculate the two numbers in my TI-84.
(I use my TI-84 to get z and p-value)
Problem 4: Two Proportions In 1995, the American Cancer Society randomly sampled 1500 adults of which 555 smoked. In 2005, they surveyed 1730 adults and ound that 578 of them smoked. At the 5% level of significance test the claim that the proportion of...
Given X, and x, distributions that are normal or approximately normal with unknown o, and on, the value of t corresponding to X, - X, has a distribution that is approximated by a Student's t distribution. We use the convention that the degrees of freedom is approximately the smaller of n - 1 and n, - 1. However, a more accurate estimate for the appropriate degrees of freedom is given by Satterthwaite's formula: 2 2 xn2 522 +$22) d.f. z...
Hello,
Q1: where does the f(1,17) the 1 come from?
Q2, how do i get the second equation from the first
equation?
thanks
Heat treating is often used to carburize metal parts such as gears. The thickness of the carburized layer is considered an important feature of the gear, and it contributes to the overall reliability of the part. Because of the critical nature of this feature, a lab test is performed on each furnace load. The test is a...
It's a multi part question set - if you can't finish all of
it, that's ok! I would just really appreciate any and all help as
soon as possible, will give thumbs up, thank you so much in
advance!
Thank you!! Inventory management There are 13 questions in this set As you proceed through these questions, use necessary information from previous questions. Walzon recently made changes to its inventory management and delivery systems. Walzon wants to know whether these changes...
It's a multi part question set - if you can't finish all of it,
that's ok! I would just really appreciate any and all help as soon
as possible, will give thumbs up, thank you so much in advance!
Here are more clear photos, help is really needed on the last
three questions if you can't do all of it, thank you in
advance!
IS 25 1) CL E) 10) (이 13) Thank you!! Inventory management There are 13 questions...
Need help with stats true or false questions
Decide (with short explanations) whether the following statements are true or false a) We consider the model y-Ao +A(z) +E. Let (-0.01, 1.5) be a 95% confidence interval for A In this case, a t-test with significance level 1% rejects the null hypothesis Ho : A-0 against a two sided alternative. b) Complicated models with a lot of parameters are better for prediction then simple models with just a few parameters c)...
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