Question
Applicants for a job, which involves extensive travel in Spanish speaking countries, must take a proficiency...
Applicants for a job, which involves extensive travel in Spanish speaking countries, must take a proficiency test in Spanish. The sample data below were obtained in a study of the relationship between the numbers of years applicants have studied Spanish (x) and their score on the test (y).
| x | 3 | 4 | 4 | 2 | 5 | 3 | 4 | 5 | 3 | 2 |
| y | 57 | 78 | 72 | 58 | 89 | 63 | 73 | 84 | 75 | 48 |
Would it make sense to use the regression line to predict a score for a person who has studied Spanish for 15 years? Why or why not?
A) No, because 15 years is much larger than the range of x-values in the table.
B) Yes, because the prediction is a whole number.
C) Yes, because you would substitute 15 for x in the regression equation.
D) No, because the value 15 does not appear in the table.
Homework Answers
Answer #1
| X | Y | |
| 3 | 57 | |
| 4 | 78 | |
| 4 | 72 | |
| 2 | 58 | |
| 5 | 89 | |
| 3 | 63 | |
| 4 | 73 | |
| 5 | 84 | |
| 3 | 75 | |
| 2 | 48 | |
MEAN 
|
3.5000 | 69.7000 |
S.D 
|
1.0247 | 12.2642 |
 |
0.9111 |
The Regression Equation of Y on X is
Substiture X = 15 in the fittded Regression Equation of Y on X
C) Yes, because you would substitute 15 for x in the regression equation.
NOTE: The Values of Mean, S.D and r are calculated using EXCEL.
Not the answer you're looking for?
Similar Questions
Applicants for a job, which involves extensive travel in Spanish speaking countries, must take a proficiency...
Applicants for a job, which involves extensive travel in Spanish
speaking countries, must take a proficiency test in Spanish. The
sample data below were obtained in a study of the relationship
between the numbers of years applicants have studied Spanish (x)
and their score on the test (y).
x
3
4
4
2
5
3
4
5
3
2
y
57
78
72
58
89
63
73
84
75
48
Give the equation of the regression line. Round coefficients to...
Applicants for a job, which involves extensive travel in Spanish speaking countries, must take a proficiency...
Applicants for a job, which involves extensive travel in Spanish
speaking countries, must take a proficiency test in Spanish. The
sample data below were obtained in a study of the relationship
between the numbers of years applicants have studied Spanish (x)
and their score on the test (y).
x
3
4
4
2
5
3
4
5
3
2
y
57
78
72
58
89
63
73
84
75
48
Predict the test score of a person who has studied...
Applicants for a job, which involves extensive travel in Spanish speaking countries, must take a proficiency...
Applicants for a job, which involves extensive travel in Spanish
speaking countries, must take a proficiency test in Spanish. The
sample data below were obtained in a study of the relationship
between the numbers of years applicants have studied Spanish (x)
and their score on the test (y). Conduct a formal hypothesis test
to test for a linear correlation between the number of years a
person has studied Spanish and their score on the test. Use a 0.05
significance level....
Applicants for a job, which involves extensive travel in Spanish speaking countries, must take a proficiency...
Applicants for a job, which involves extensive travel in Spanish
speaking countries, must take a proficiency test in Spanish. The
sample data below were obtained in a study of the relationship
between the numbers of years applicants have studied Spanish (x)
and their score on the test (y). Conduct a formal hypothesis test
to test for a linear correlation between the number of years a
person has studied Spanish and their score on the test. Use a 0.05
significance level....
Applicants for a particular job, which involves extensive travel in Spanish speaking countries, must take a...
Applicants for a particular job, which involves extensive travel
in Spanish speaking countries, must take a
proficiency test in Spanish. The sample data below were obtained in
a study of the relationship between the
numbers of years applicants have studied Spanish (x) and their
score on the test (y).
x 3 2 4 4 4 3 4 5 3 2
y 57 74 72 58 71 63 73 78 75 53
At the 5% significance level, predict the proficiency score...
Applicants for a particular job, which involves extensive travel in Spanish-speaking countries, must take a proficiency...
Applicants for a particular job, which involves extensive
travel in Spanish-speaking countries, must take a proficiency test
in Spanish. The sample data were obtained in a study of the
relationship between the numbers of years (x) applicants have
studied Spanish and their score (y) on the test. Use the analysis
to find a 99% confidence interval for the true slope.
The regression equation is
ModifyingAbove y with caretyequals=31.53333plus+10.90476x,
with
R-sqequals=83.0%,
and
10minus−2equals=8
degrees of freedom.
Predictor
Coef
SE(Coef)
T
P...
In order for applicants to work for the foreign-service department, they must take a test in...
In order for applicants to work for the foreign-service
department, they must take a test in the language of the country
where they plan to work. The data below show the relationship
between the number of years that applicants have studied a
particular language and the grades they received on the proficiency
exam.
Number of Years (X) 3 4 4 5 3 6 2 7 3
Grades on Test (Y) 61 68 75 82 73 90 58 93 72
What...
A collection of paired data consists of the number of years that students have studied Spanish...
A collection of paired data consists of the number of
years that students have studied Spanish and their scores on a
Spanish language proficiency test. A computer program was used to
obtain the least squares linear regression line and the computer
output is shown below. Along with the paired sample data, the
program was also given an x value of 2 (years of study) to be used
for predicting test score.
Equation: y = mx +
b
Statistics:
r2 =...
1. A sales manager collected the following data on annual sales for new customer accounts and...
1. A sales manager collected the following data on annual sales
for new customer accounts and the number of years of experience for
a sample of 10 salespersons.
Salesperson
Years of
Experience
Annual Sales
($1000)
1
1
84
2
1
81
3
2
87
4
4
101
5
5
104
6
7
118
7
8
119
8
9
120
9
10
127
10
11
134
a. Compute the residuals and choose a residual
plot for this problem.
2.
The following...
In February 2012, the Pepsi Next product was launched into the US market. This case study...
In February 2012, the Pepsi Next product was launched into
the US market. This case study provides students with an
interesting insight into PepsiCo’s new product process and some of
the challenging decisions that they faced along the way.
Pepsi Next Case Study
Introduction
Pepsi Next was launched by PepsiCo into the US market in
February 2012, and has since been rolled out to various
international markets (for instance, it was launched in Australia
in September 2012).
The new product...
ADVERTISEMENT
Need Online Homework Help?
Get Answers For Free
Most questions answered within 1 hours.
ADVERTISEMENT
Active Questions
asked 3 minutes ago
asked 11 minutes ago
asked 11 minutes ago
asked 19 minutes ago
asked 23 minutes ago
asked 47 minutes ago
asked 51 minutes ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago