Homework Answers
1. Unweighted mean center = ((8.9+7.8+2.3+9.4+8.8)/5) , ((1.2+2.3+9.1+3.3+3.7)/5)
= (7.44, 3.92)
2. Weighted mean center=
((8.9*1000+7.8*50,000+2.3*2500+9.4*3000+8.8*8000)/(1000+50000+2500+3000+8000)) ,
((1.2*1000+2.3*50,000+9.1*2500+3.3*3000+3.7*8000)/(1000+50000+2500+3000+8000))
=(503250/64500),(178450/64500)
=(7.802326, 2.766667)
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3. Find the unweighted and weighted mean centers for the following settlements siiki x, y)'opulaiion 1,000...
2. Find the grouped means for the ages of male and females listed belovw Male 12...
2. Find the grouped means for the ages of male and females listed belovw Male 12 10 Female Age <15 years 15-24 years 25-54 years 55-64 years 65+ years 10 31 6 3. Find the unweighted and weighted mean centers for the following settlements Settlement (x, y) Population 1,000 50,000 2,500 3,000 8,000 (7.8, 2.3) (9.4, 3.3) (8.8, 3.7)
I need a help on question #21 D & E only! I figure weighted/unweighted mean already...
I need a help on question #21 D & E
only!
I figure weighted/unweighted mean already
Weighted mean is : (3.336, 3.483) / Unweighted mean is: (2.94,
2.48)
thanks in advance!
20. Is the following data on incomes positively or negatively skewed? You do not need to calculate skewness, but you should justify your answer Data in thousands: 45, 43, 32, 23, 45, 43, 47, 39, 21, 90, 230. 21. (a) Find the weighted mean center of population, where cities'...
use the following cell phone airport data speeds (mbps) from a particular network. find the percentiles...
use the following cell phone airport data speeds (mbps) from a particular network. find the percentiles corresponding to the data speed 3.7 mbps. 0.1 0.1 0.2 0.2 0.3 0.3 0.3 0.3 0.3 0.4 0.7 0.7 0.8 0.8 0.9 1.4 1.4 1.5 1.5 1.5 1.6 1.8 2.3 2.5 2.5 2.7 2.8 2.8 3.3 3.3 3.7 4.6 4.6 4.8 5.2 7.4 7.8 8.5 8.7 8.9 9.1 9.2 9.5 11.1 12.7 12.8 13.7 13.9 15.6 27.4
Use the following cell phone airport data speeds (Mbps) from a particular network. Find P70- 0.5...
Use the following cell phone airport data speeds (Mbps) from a particular network. Find P70- 0.5 0.5 0.6 0.6 0.6 1.5 0.1 0.7 2.3 4.1 0.5 0.7 2.5 1.4 0.4 0.7 2.4 4.7 10.6 0.8 2.9 2.9 1.9 3.9 3.3 0.6 1.6 3.8 7.8 15.3 0.8 2.6 4.8 12.9 0.6 1.6 3.9 8.4 15.3 0 0 6.2 4.8 12.1 5.3 14.4 5.6 14.5 8.8 25.8 9.4 15.1 P70 = Mbps (Type an integer or a decimal. Do not round.)
(3) Unbiased Estimator Y is distributed N( 14, a2 ). Weighted sample mean is defined in the following: N Σ4r Y = -...
(3) Unbiased Estimator Y is distributed N( 14, a2 ). Weighted sample mean is defined in the following: N Σ4r Y = - S.Σα =Ν (a) Please prove weighted sample mean is unbiased
(3) Unbiased Estimator Y is distributed N( 14, a2 ). Weighted sample mean is defined in the following: N Σ4r Y = - S.Σα =Ν (a) Please prove weighted sample mean is unbiased
Consider the following sample of 44 obscrvations: 8.9; 12.4; 8.6; 11.3; 9.2; 8.8; 8.8; 6.2; .07;...
Consider the following sample of 44 obscrvations: 8.9; 12.4; 8.6; 11.3; 9.2; 8.8; 8.8; 6.2; .07; 7.1; 11.8; 10.7; 7.6;9.1; 9.2; 8.2; 9.0; 8.7;9.1; 10.9; 10.3; 9.6; 7.8; 11.5; 9.3; 7.9; 8.8; 12.7; 8.4; 7.8; 5.7; 10.5; 10.5;9.6; 8.9; 10.2; 10.3; 7.7; 10.6; 8.3; 8.8; 9.5; 8.8; 9.4. 1. Find the mcan and the standard deviation for the data given 2. Calculate the interval for y± ks for k E {1, 2, 3). C ount the number of mcasureents that...
2. Consider the following two variables X and Y: 4 a. (2 pts) Find the mean of X, and mean of Y b...
please lease solve all
questions.
2. Consider the following two variables X and Y: 4 a. (2 pts) Find the mean of X, and mean of Y b. (2 pts) Find the standard deviation of X, and standard deviation of Y C. (3 pts) Find the covariance between X and Y d. (2 pts) Find correlation coefficient between X and Y and comment on your answer. 3. The following table shows a random sample of 100 hikers and the areas...
X is the amount of chocolate consumption y is the Nobel Laureate rate Chocolate 4.5 10.2...
X is the amount of chocolate consumption y is the Nobel Laureate rate Chocolate 4.5 10.2 4.4 Nobel 5.5 24.3 8.6 0.1 3.9 0.7 6.1 0.1 25.3 7.6 9.0 12.7 7.3 6.3 11.6 2.5 8.8 3.7 1.8 4.5 3.6 20 12.7 3.3 1.5 11.4 25.5 3.1 1.9 1.7 31.9 31.5 18.9 10.8 3.6 6.4 11.9 9.7 5.3 a. Determine the linear regression equation. b. Find the linear correlation coefficient and determine if there is linear correlation between x and y....
Let Y-ar+b (a) Find the mean and variance of Y in terms of the mean and variance of X b) Evaluate...
Let Y-ar+b (a) Find the mean and variance of Y in terms of the mean and variance of X b) Evaluate the mean and variance ofY if Xhas the following PDF: (a)-ele (c) Evaluate the mean and variance of Y if Xis the Gaussian random variable with mean 0 and variance d) Evaluate the mean and variance of Yif X-bcos 2U) where U is a uniform random variable in of 1 the unit interval.
Let Y-ar+b (a) Find the mean...
Using the data file provided with both variables, x and y, answer the following questions using...
Using the data file provided with both variables, x and y, answer the following questions using Excel*: 1.Create a scatterplot with the data. Comment on direction, form, strength, outliers and/or other significant findings. 2.Use the linear model to fit a line to the data and determine the equation ỹ = b0 + b1x and Interpret b0and b1. 3.Calculate the coefficient of correlation. Discuss the strength of correlation between the explanatory and response variables. 4.Predict the value for ỹ when you...
2. Find the grouped means for the ages of male and females listed belovw Male 12 10 Female Age <15 years 15-24 years 25-54 years 55-64 years 65+ years 10 31 6 3. Find the unweighted and weighted mean centers for the following settlements Settlement (x, y) Population 1,000 50,000 2,500 3,000 8,000 (7.8, 2.3) (9.4, 3.3) (8.8, 3.7)
I need a help on question #21 D & E
only!
I figure weighted/unweighted mean already
Weighted mean is : (3.336, 3.483) / Unweighted mean is: (2.94,
2.48)
thanks in advance!
20. Is the following data on incomes positively or negatively skewed? You do not need to calculate skewness, but you should justify your answer Data in thousands: 45, 43, 32, 23, 45, 43, 47, 39, 21, 90, 230. 21. (a) Find the weighted mean center of population, where cities'...
Use the following cell phone airport data speeds (Mbps) from a particular network. Find P70- 0.5 0.5 0.6 0.6 0.6 1.5 0.1 0.7 2.3 4.1 0.5 0.7 2.5 1.4 0.4 0.7 2.4 4.7 10.6 0.8 2.9 2.9 1.9 3.9 3.3 0.6 1.6 3.8 7.8 15.3 0.8 2.6 4.8 12.9 0.6 1.6 3.9 8.4 15.3 0 0 6.2 4.8 12.1 5.3 14.4 5.6 14.5 8.8 25.8 9.4 15.1 P70 = Mbps (Type an integer or a decimal. Do not round.)
(3) Unbiased Estimator Y is distributed N( 14, a2 ). Weighted sample mean is defined in the following: N Σ4r Y = - S.Σα =Ν (a) Please prove weighted sample mean is unbiased
(3) Unbiased Estimator Y is distributed N( 14, a2 ). Weighted sample mean is defined in the following: N Σ4r Y = - S.Σα =Ν (a) Please prove weighted sample mean is unbiased
Consider the following sample of 44 obscrvations: 8.9; 12.4; 8.6; 11.3; 9.2; 8.8; 8.8; 6.2; .07; 7.1; 11.8; 10.7; 7.6;9.1; 9.2; 8.2; 9.0; 8.7;9.1; 10.9; 10.3; 9.6; 7.8; 11.5; 9.3; 7.9; 8.8; 12.7; 8.4; 7.8; 5.7; 10.5; 10.5;9.6; 8.9; 10.2; 10.3; 7.7; 10.6; 8.3; 8.8; 9.5; 8.8; 9.4. 1. Find the mcan and the standard deviation for the data given 2. Calculate the interval for y± ks for k E {1, 2, 3). C ount the number of mcasureents that...
please lease solve all
questions.
2. Consider the following two variables X and Y: 4 a. (2 pts) Find the mean of X, and mean of Y b. (2 pts) Find the standard deviation of X, and standard deviation of Y C. (3 pts) Find the covariance between X and Y d. (2 pts) Find correlation coefficient between X and Y and comment on your answer. 3. The following table shows a random sample of 100 hikers and the areas...
X is the amount of chocolate consumption y is the Nobel Laureate rate Chocolate 4.5 10.2 4.4 Nobel 5.5 24.3 8.6 0.1 3.9 0.7 6.1 0.1 25.3 7.6 9.0 12.7 7.3 6.3 11.6 2.5 8.8 3.7 1.8 4.5 3.6 20 12.7 3.3 1.5 11.4 25.5 3.1 1.9 1.7 31.9 31.5 18.9 10.8 3.6 6.4 11.9 9.7 5.3 a. Determine the linear regression equation. b. Find the linear correlation coefficient and determine if there is linear correlation between x and y....
Let Y-ar+b (a) Find the mean and variance of Y in terms of the mean and variance of X b) Evaluate the mean and variance ofY if Xhas the following PDF: (a)-ele (c) Evaluate the mean and variance of Y if Xis the Gaussian random variable with mean 0 and variance d) Evaluate the mean and variance of Yif X-bcos 2U) where U is a uniform random variable in of 1 the unit interval.
Let Y-ar+b (a) Find the mean...
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