Posted by tracy on Sunday, June 23, 2013 at 12:03am.
Consider the following bivariate data.
Point A B C D E F G H I J
x 3 4 2 1 7 2 1 0 4 2
y 1 7 3 3 6 6 5 0 6 2
(b) Calculate the covariance. (Give your answer correct to two decimal places.)
(c) Calculate sx and sy. (Give your answers correct to three decimal places.)
sx =
sy =
(d) Calculate r using formula 13.2. (Give your answer correct to two decimal places.)
(e) Calculate r using formula 13.3. (Give your answer correct to two decimal places.)

statistics  MathMate, Sunday, June 23, 2013 at 6:03am
What did you get using the given formulas 13.2 and 13.3?

statistics  tracy, Sunday, June 23, 2013 at 1:03pm
this is what I done and it was wrong mean of x = 2.6 sd = 2.01108, y mean 3.9, sd 2.42441; then I added the sd 4.43549/(2.011080)(2.42441) = 5.3471
c. I just added all the x together = 26
sy = 39 The formula for 13.2 is r=covar(xto the 1power and y to 1power)= covar (x,y)/Sx X Sy
13.3 formula is ss(xy)/ sqrt ss(x)*ss(y) and that I got 127/sqrt 26*205which I had for the y squared
and that I got 190.5 which was wrong.
Answer This Question
Related Questions
 math  Consider the following bivariate data. Point A B C D E F G H I J x 3 4 2 ...
 math help  Can some one help me with this one??? Consider the following ...
 math  Consider the following bivariate data. Point A B C D E F G H I J x 3 4 2 ...
 statistics check  Consider the following bivariate data. Point A B C D E F G H ...
 statistics  Consider the following situation, and answer each of the following ...
 statistics  27. Consider the following hypothesis test. H0: µ = 15 Ha: µ ≠...
 Algebra  I am confused about this... A survey is being conducted to determine ...
 statistics  Consider the following types of data that were obtained from a ...
 math  • what is statistics • Perspective statistics • inferential statistics • ...
 statistics  The following data on the number of iron workers in the United ...
More Related Questions