Question

Exhibit 14-2 A sample of data y x 5 15 7 12 9 10 11 7

For each unit that x goes up the predicted value of y

a. goes down by 0.7647

b. goes up by 0.7647

c. does not change

d. is the same as the p-value

Answer #1

Data Set A: 11, 12, 13
Data Set B: 9, 10, 11, 12, 13, 14, 15
Data Set C: 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18
Find the mean, sample standard deviation–treating the data as a
sample, and the population standard deviation–treating the data as
a population.

The following sample observations were randomly selected
x: 14, 7 ,5 ,11 ,12
y: 11, 8 ,15 ,14, 8
A. Determine the regression equation
.B. Determine the vaule of Y' When X is 10

X Independent variable
Y dependent Variable
15
5
12
7
10
9
7
11
You are given the above information on x and y. The coefficient
of determination equals
a. .99705
b. .9941
c. -.99705
d. -.9941

Consider the following sample:
x
9
6
7
5
8
y
19
14
16
12
15
Calculate the coefficient of correlation. Does correlation
coefficient provide information about the relationship between x
and y? Explain.
Find the linear regression line.
Find y, if x is 10.

Given the following data set: X: 3 7 9 11 15 Y: 11 16 16 16
16
a. Find the correlation coefficient.
b. What is the regression equation?
c. Using the regression to predict the value of Y when X =
11.
d. What is the predicted residual when X = 11?
e. Find the root mean square error.

Consider the data:
X - 1 3 5 7
9 11 13 15
Y - 6 14 2 20 10 18 26 22
(c) Obtain the equation of the regression line for these data

Consider the data in the worksheet below.
X
Y
5
6
6
9
7
11
8
13
9
14
10
15
11
15
12
13
a. Generate a model for y as a function of x.
b. Is this model useful? Justify your conclusion based on:
i. R2 Adjusted
ii. Hypothesis test for model coefficient
iii. overall model adequacy test
iv. regression assumptions.
c. If needed, modify model as appropriate and generate a new
model.
Please be as detailed in...

Let
U = {5, 6, 7, 8, 9, 10, 11, 12, 13, 14},
A = {5, 7, 9, 11, 13},
B = {6, 8, 10, 12, 14},
and
C = {5, 6, 8, 9, 12, 13}.
List the elements of each set. (Enter your answers using roster
notation. Enter EMPTY or ∅ for the empty set.)
(a) Ac ∩ (B
∩ C c)
(b) (A ∪ Bc) ∪
(B ∩ C c)
(c) (A ∪
B)c ∩
C c

Cork price: 16 10 15 10 17 11 14 13 11 14 11 16 18 16 10 17 14
14 16 7 10 12 19 15 16 14 9 12 21 13 10 16 12 16 13 17 17 13 14 18
11 12 15 16 13 18 16 17 12 12 14 9 11 14 19 13 11 17 11 13 15 14 18
18 18 12 10 11 13 14 11 14 18 13 13 19 17 14...

Cork price: 16 10 15 10 17 11 14 13 11 14 11 16 18 16 10 17 14
14 16 7 10 12 19 15 16 14 9 12 21 13 10 16 12 16 13 17 17 13 14 18
11 12 15 16 13 18 16 17 12 12 14 9 11 14 19 13 11 17 11 13 15 14 18
18 18 12 10 11 13 14 11 14 18 13 13 19 17 14...

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