Question
In: Math
Below is a table displaying the number of employees (x) and the profits per employee (y)...
Below is a table displaying the number of employees (x) and the profits per employee (y) for 16 publishing firms. Employees are recorded in 1000s of employees and profits per employee are recorded in $1000s.
| Profits ($1000s) | 33.5 | 31.4 | 25.0 | 23.1 | 14.2 | 11.7 | 10.8 | 10.5 | 9.8 | 9.1 | 8.5 | 8.3 | 4.8 | 3.2 | 2.7 | -9.5 |
| Employees (1000s) | 9.4 | 6.3 | 10.7 | 7.4 | 17.1 | 21.2 | 36.8 | 28.5 | 10.7 | 9.9 | 26.1 | 70.5 | 14.8 | 21.3 | 14.6 | 26.8 |
What is the correlation between these two variables?
If a linear regression model were fit, what is the value of the slope and the value of the y-intercept?
In a test for the slope of the regression line being equal to zero versus the two-sided alternate, what is the value of the test statistic and the p-value?
Solutions
also attaching the output from
excel
milcah answered 2 months agoRelated Solutions
In the table below, let X be the number delinquent peers a respondent has and Y...
In the table below, let X be the
number delinquent peers a respondent has and Y be the number of
arrests they have. Calculate the bivariate correlation
between X and Y and provide an interpretation of the correlation
coefficient documenting whether it is significant.
X
Y
2
1
3
1
3
3
5
3
6
3
6
5
7
6
8
8
8
9
10
9
Using the data, calculate the equation for an ordinary least
squares regression (slope, Y-intercept, and...
ABC Corporation has 350 employees. The distribution of number of sick days per employee per year...
ABC Corporation has 350 employees. The distribution of number
of sick days per employee per year for the population of 350
employees is not highly skewed and has a mean of 12 and a standard
deviation of 4. Suppose a simple random sample of 25 employees'
number of sick days is taken, what is the probability that the
sample of 25 will have mean number of sick days between 10 and 14?
Show your work.
The joint probability distribution of variables X and Y is shown in the table below. ...............................................................................X..........................................................................
The joint probability distribution of variables X and
Y is shown in the table below.
...............................................................................X.......................................................................
Y
1
2
3
1
0.30
0.18
0.12
2
0.15
0.09
0.06
3
0.05
0.03
0.02
Calculate E(XY)
Determine the marginal probability distributions of X
and Y.
Calculate E(X) and E(Y)
Calculate V(X) and V(Y)
Are X and Y independent? Explain.
Find P(Y = 2| X = 1)
Calculate COV(X,Y). Did you expect
this answer? Why?
Find the probability distribution...
for the quantitative variables x and y are given in the table below. These data are...
for the quantitative variables
x
and
y
are given in the table below. These data are plotted in the
scatter plot shown next to the table.
In the scatter plot, sketch an approximation of the
least-squares regression line for the data.
x
y
7.4
6.6
4.0
5.0
2.0
3.9
3.1
5.0
9.4
8.4
4.7
5.9
6.6
6.2
8.5
6.9
7.9
7.3
1.6
3.7
4.4
4.6
2.8
3.9
2.7
3.1
5.7
6.3
5.9
7.3
9.7
8.3
6.9
6.3
8.8
8.4
x...
The two data sets in the table below are dependent random samples. The population of (x−y)(x-y)...
The two data sets in the table below are dependent random
samples. The population of (x−y)(x-y) differences is approximately
normally distributed. A claim is made that the mean difference
(x−y)(x-y) is not equal to -23.5.
x
60
62
46
45
37
45
46
46
y
79
77
75
86
83
71
76
77
For each part below, enter only a numeric value
in the answer box. For example, do not type "z =" or
"t =" before your answers. Round...
The two data sets in the table below are dependent random samples. The population of (x−y)(x-y)...
The two data sets in the table below are dependent random
samples. The population of (x−y)(x-y) differences is approximately
normally distributed. A claim is made that the mean difference
(x−y)(x-y) is greater than 17.9.
x
67
79
68
52
56
78
78
78
y
30
50
32
49
31
51
37
35
For each part below, enter only a numeric value
in the answer box. For example, do not type "z =" or
"t =" before your answers. Round each...
Consider the following data on x and y shown in the table below, x 2 4...
Consider the following data on x and y shown in the table
below,
x
2
4
7
10
12
15
18
20
21
25
y
5
10
12
22
25
27
39
50
47
65
Fit the model E(y)=β0+β1x to the data, and plot
the residuals versus x for the model on Minitab. Do you detect any
trends? If so, what does the pattern suggest about the model?
Using the table below, calculate the variance of X, variance of Y, standard deviation of X,...
Using the table below, calculate the variance of X, variance of
Y, standard deviation of X, standard deviation of Y,
the covariance between X and Y, the correlation coefficient between
X and Y, and find the regression line assuming X is the independent
variable (find the slope and the intercept). Show your work
Fill in the Blanks:
X
Y
X-Xbar
Y-Ybar
(X-Xbar)^2
(Y-Ybar)^2
(X-Xbar)*(Y-Ybar)
5
3
9
6
12
15
17
20
21
23
Sum
Calculate the following and show...
The table below shows the number of cars sold last month by seven employees at Concord...
The table below shows the number of cars sold last month by
seven employees at Concord Motors and their number of years of
sales experience.
Experience
Sales
1
8
2
6
2
7
4
14
5
9
6
13
8
10
Analyze this data (what is correlation coefficient, slope for
regression equation, y intercept for regression equation, standard
error of estimate).
The table below shows the number of cars sold last month by seven employees at Concord...
The table below shows the number of cars sold last month by
seven employees at Concord Motors and their number of years of
sales experience.
Experience
Sales
1
8
2
6
2
7
4
14
5
9
6
13
8
10
Management would like to use simple regression analysis to
estimate monthly car sales using the number of years of sales
experience. The 95% confidence interval for the regression slope is
________.
Group of answer choices
a (-1.842, 3.158)
b...
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