Question
If we subtract 5 from all of the x measurements, what happens to the sample correlation...
If we subtract 5 from all of the x measurements, what happens to the sample correlation r? What happens to the fitted regression slope βˆ 1? What about the intercept βˆ 0?
Homework Answers
Answer #1
If we subtract 5 from all of the x measurements, sample correlation will remain the same.
The fitted regression slope 
and since in the new set up both r, sx will remain same
and sy is definitely unaffected, so fitted regression
slope will also remain the same
Since in the new set up, 
will
decrease by 5 units, so 
will increase by 
unit.
Not the answer you're looking for?
Similar Questions
Data Set: x y 0 4 2 2 2 0 5 -2 6 1 1. Find...
Data Set:
x
y
0
4
2
2
2
0
5
-2
6
1
1. Find intercept b0
2. Find slope B1
3. Find the best fitted linear regression equation
4.Graph observations
5.Graph the linear equation on the same plot
6. Find the coefficient of Determination r²
7. Find the linear correlation coefficient r
8.Interpret r (the correlation between x & y)
Linear Regression and Correlation. x y 3 -3.26 4 2.72 5 1.2 6 1.88 7 0.16...
Linear Regression and Correlation.
x
y
3
-3.26
4
2.72
5
1.2
6
1.88
7
0.16
8
-5.66
9
3.02
10
-6.7
11
-3.92
12
-5.34
Compute the equation of the linear regression line in the form y =
mx + b, where m is the slope and b is the intercept.
Use at least 3 decimal places.
y = x +
Compute the correlation coeficient for this data set. Use at least
3 decimal places.
r=
Compute the P-value...
Linear Regression and Correlation. x y 3 -10.52 4 1.94 5 -2.7 6 -3.14 7 -9.18...
Linear Regression and Correlation.
x
y
3
-10.52
4
1.94
5
-2.7
6
-3.14
7
-9.18
8
-4.82
9
-12.26
10
-11.1
11
-6.44
Compute the equation of the linear regression line in the form y =
mx + b, where m is the slope and b is the intercept.
Use at least 3 decimal places. (Round if necessary)
y = x +
Compute the correlation coeficient for this data set. Use at least
3 decimal places. (Round if necessary)...
2. An educational psychologist gathers data from a sample of college students. He finds the correlation between grade...
2. An educational psychologist gathers data from a
sample of college students. He finds the correlation
between grade point average and class attendance to be 0.60, and he
finds the correlation between grade point average and amount of
time spent playing video games to be
-0.60. What can the educational psychologist
conclude about these correlations?
The correlation of r = 0.60 is stronger than the correlation of
r = -0.60.
The correlation of r = 0.60 is just as strong as the
correlation...
For the following data, find the value of “r” the correlation coefficient, as well as the...
For the following data, find the value of “r”
the correlation coefficient, as well as the values
of “a” and “b” the y intercept and slope
, respectively, of the regression line. Please graph the
line as well.
x
y
1
5
2
8
4
11
6
15
Suppose the correlation between study time x and test score y is given by r =...
Suppose the correlation between study time x and test score y is
given by r = .939. What does this tell us about the correlation
between x and y? 0 We have 12 = .8817. What does this tell us about
the connection between x and y (regression of y on x)?
a) For the given degrees of freedom, larger values of the chi square statistic are associated...
a) For the given degrees of freedom, larger values of the chi
square statistic are associated with ___________
answer options:
1) there is no relationship between chi-square values and
p-values 2) larger p-values 3)smaller p-values
b) Correlation analysis revealed r = -.72. What do we already
know about the regression slope or intercept?
answer options:
1) b > 0 2) a < 0 c)a > 0 d) b < 0
c) As sample size increases, what happens to the critical...
Use the data entry method in your scientific calculator to enter the following measurements. x 1...
Use the data entry method in your scientific calculator to enter
the following measurements.
x
1
2
3
4
5
6
y
5.5
4.5
4.3
3.5
3.0
2.6
Recall the proper memories to find the correlation coefficient,
r. (Round your answer to four decimal places.)
r =
Recall the proper memories to find the y-intercept,
a, of the line. (Round your answer to three decimal
places.)
a =
Recall the proper memories to find the slope, b, of the
line....
Recorded in the table below are the blood pressure measurements (in millimeters) for a sample of...
Recorded in the table below are the blood pressure measurements
(in millimeters) for a sample of 12 adults. Does there appear to be
a linear relationship between the diastolic and systolic blood
pressures? At the 5% significance level, test the claim that
systolic blood pressure and diastolic blood pressure have a linear
relationship.
Systolic
Diastolic
107
71
110
74
133
91
115
83
118
88
134
87
123
77
154
94
119
69
130
76
108
69
112
75
Data...
Recorded in the table below are the blood pressure measurements (in millimeters) for a sample of...
Recorded in the table below are the blood pressure measurements
(in millimeters) for a sample of 12 adults. Does there appear to be
a linear relationship between the diastolic and systolic blood
pressures? At the 5% significance level, test the claim that
systolic blood pressure and diastolic blood pressure have a linear
relationship.
Systolic
Diastolic
116
70
154
94
134
87
107
71
119
69
133
91
115
83
113
77
112
75
110
74
118
88
157
103
Data...
ADVERTISEMENT
Need Online Homework Help?
Get Answers For Free
Most questions answered within 1 hours.
ADVERTISEMENT
Active Questions
asked 24 minutes ago
asked 42 minutes ago
asked 42 minutes ago
asked 46 minutes ago
asked 59 minutes ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago