A =
(1 −7 5 0
0 10 8 2
2 4 10 3
−4 8 −9 6)
(1) Count the number of rows that contain negative
components.
(2) Obtain the inverse of A and count the number of columns that
contain even number of positive components.
(3) Assign column names (a,b,c,d) to the columns of A.
(4) Transform the matrix A into a vector object a by stacking
rows.
(5) Replace the diagonal components of A with (0,0,2,3). Hint:...
Given the following dataset x 1
1 2 3 4 5
y 0 2 4
5 5 3
We want to test the claim that there is a correlation between
xand y. The level of cretaine phosphokinase (CPK) in blood samples
measures the amount of muscle damage for athletes. At Jock State
University, the level of CPK was determined for each of 25 football
players and 15 soccer players before and after practice. The two
groups of athletes are trained...
Given the following dataset
x
1
1
2
3
4
5
y
0
2
4
5
5
3
We want to test the claim that there is a correlation between
xand y.
(a) What is the null hypothesis Ho and the alternative
hypothesis H1?
(b) Using α= 0.05, will you reject Ho? Justify your answer by
using a p-value.
(c) Base on your answer in part (b), is there evidence to
support the claim?
(d) Find r, the linear correlation...
Given the two lines
(x, y, z) = (4, -3, 5) + t(2, 0, -3)
(x, y, z) = (4, -3, 5) + s(5, 1, -1)
a) determine a vector equation for the plane that combines the
two lines
b) parametric equations of the plane that contains the two
lines
c) Cartesian equation of the plane that contains the two
lines
ID
X
Y
1
2
3
2
3
6
3
4
6
4
5
7
5
8
7
6
5
7
7
6
7
8
8
8
9
7
8
10
12
11
Test the significance of the correlation coefficient.
Then use math test scores (X) to predict physics test scores
(Y). Do the following:
Create a scatterplot of X and Y.
Write the regression equation and interpret the regression
coefficients (i.e., intercept and slope).
Predict the physics score for each....
Maria says that 4 2/3 x 7 1/5 = 4 x 7 + 2/3 x 1/5. Explain why
Maria has made a good attempt, but her answer is not correct.
Explain how to work with what Maria has already written and modify
it to get the correct answer. In other words, don’t just start from
scratch and show Maria how to do the problem, but rather take what
she has already written, use it, and make it mathematically
correct. Which...