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 and their score on the test. $$\begin{array} { c | c }
\begin{array} { c }
\text { Number } \
\text { of years }
\end{array} & \text { Score } \
\hline 3 & 57 \
4 & 78 \
4 & 72 \
2 & 58 \
5 & 89 \
3 & 63 \
4 & 73 \
5 & 84 \
3 & 75 \
2 & 48
\end{array}$$ Using a 1% level of significance,do the data provide sufficient evidence to conclude that the slope of the regression line is not 0 and hence that number of years of study is useful as a predictor of score on the test?

Question

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 and their score on the test. $$\begin{array} { c | c } 
\begin{array} { c } 
\text { Number } \
\text { of years }
\end{array} & \text { Score } \
\hline 3 & 57 \
4 & 78 \
4 & 72 \
2 & 58 \
5 & 89 \
3 & 63 \
4 & 73 \
5 & 84 \
3 & 75 \
2 & 48
\end{array}$$ Using a 1% level of significance,do the data provide sufficient evidence to conclude that the slope of the regression line is not 0 and hence that number of years of study is useful as a predictor of score on the test?

Quizplus · Accepted Answer

The Answer of 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 and their score on the test. $$\begin{array} { c | c } 
\begin{array} { c } 
\text { Number } \
\text { of years }
\end{array} & \text { Score } \
\hline 3 & 57 \
4 & 78 \
4 & 72 \
2 & 58 \
5 & 89 \
3 & 63 \
4 & 73 \
5 & 84 \
3 & 75 \
2 & 48
\end{array}$$ Using a 1% level of significance,do the data provide sufficient evidence to conclude that the slope of the regression line is not 0 and hence that number of years of study is useful as a predictor of score on the test?

Applicants for a Particular Job,which Involves Extensive Travel in Spanish-Speaking