A sociologist is interested in the relation between x-number of job changes and y-annual salary (in thousands of dollars) for people living in the Nashville area. A random sample of 10 people employed in Nashville provided the following information. * (number of ich changes) 5 6 3 6 1 5 9 10 10 3 36 35 37 32 32 38 43 37 40 33 Y (Salary in $1000) USE SALT In this setting we have Ex-58, Ly - 363, 2x²-422, zy² = 13,289, and Exy-2171. (a) Find x, y, b, and the equation of the least-squares line. (Round your answers for x and y to two decimal places. Round your least-squares estimates to four decimal places.) b- ŷ- (b) Draw a scatter diagram displaying the data. Graph the least-squares line on your scatter diagram. Be sure to plot the point (x,y). (c) Find the sample correlation coefficient r and the coefficient of determination. (Round your answers to three decimal places.) r What percentage of variation in y is explained by the least-squares model? (Round your answer to one decimal place.) % (d) Test the claim that the population correlation coefficient is positive at the 5% level of significance. (Round your test state t- Find or estimate the P-value of the test statistic. OP-value> 0.250 0.125 < P-value < 0.250 0.100 < P-value < 0.125 0.075 < P-value < 0.100 O0.050 < P-value < 0.075 O 0.025 < P-value < 0.050 0.010 < P-value < 0.025 0.005 0. Reject the null hypothesis. There is insufficient evidence that p > 0. Fall to reject the null hypothesis. There is sufficient evidence that p > 0. Fall to reject the null hypothesis. There is insufficient evidence that p > 0. (e) If someone had x-9 job changes, what does the least-squares line predict for y, the annual salary? (Round your answer to two decimal places.) thousand dollars (f) Find S. (Round your answer to three decimal places.) 5- (g) Find a 90% confidence interval for the annual salary of an individual with x-9 job changes. (Round your answers to two decimal places.) lower limit upper limit thousand dollars thousand dollars (h) Test the daim that the slope of the population least-squares line is positive at the 5% level of significance. (Round your test statistic to three decimal places t- Find or estimate the P-value of the test statistic. OP-value> 0.250 O 0.125 < P-value < 0.250 0.100 < P-value < 0.125 0.075 < P-value < 0.100 0.050 < P-value < 0.075 0.025 < P-value < 0.050 0.010 < P-value < 0.025 O 0.005 < P-value < 0.010 0.0005 < P-value < 0.005 OP-value < 0.0005 Condusion Reject the null hypothesis. There is sufficient evidence that > 0. Reject the null hypothesis. There is insufficient evidence that > 0. O Fall to reject the null hypothesis. There is sufficient evidence that > 0. Fall to reject the null hypothesis. There is insufficient evidence that > 0. (1) Find a 90% confidence interval for and interpret its meaning. (Round your answers to three decimal places.) lower limit upper limit Interpretation O For each less job change, the annual salary increases by an amount that falls outside the confidence interval. O For each less job change, the annual salary increases by an amount that falls within the confidence interval. O For each additional job change, the annual salary increases by an amount that falls outside the confidence interval. For each additional job change, the annual salary increases by an amount that falls within the confidence interval.

A sociologist is interested in the relation between x-number of job changes and y-annual salary (in thousands of dollars) for people living in the Nashville area. A random sample of 10 people employed in Nashville provided the following information. * (number of ich changes) 5 6 3 6 1 5 9 10 10 3 36 35 37 32 32 38 43 37 40 33 Y (Salary in $1000) USE SALT In this setting we have Ex-58, Ly - 363, 2x²-422, zy² = 13,289, and Exy-2171. (a) Find x, y, b, and the equation of the least-squares line. (Round your answers for x and y to two decimal places. Round your least-squares estimates to four decimal places.) b- ŷ- (b) Draw a scatter diagram displaying the data. Graph the least-squares line on your scatter diagram. Be sure to plot the point (x,y). (c) Find the sample correlation coefficient r and the coefficient of determination. (Round your answers to three decimal places.) r What percentage of variation in y is explained by the least-squares model? (Round your answer to one decimal place.) % (d) Test the claim that the population correlation coefficient is positive at the 5% level of significance. (Round your test state t- Find or estimate the P-value of the test statistic. OP-value> 0.250 0.125 < P-value < 0.250 0.100 < P-value < 0.125 0.075 < P-value < 0.100 O0.050 < P-value < 0.075 O 0.025 < P-value < 0.050 0.010 < P-value < 0.025 0.005 0. Reject the null hypothesis. There is insufficient evidence that p > 0. Fall to reject the null hypothesis. There is sufficient evidence that p > 0. Fall to reject the null hypothesis. There is insufficient evidence that p > 0. (e) If someone had x-9 job changes, what does the least-squares line predict for y, the annual salary? (Round your answer to two decimal places.) thousand dollars (f) Find S. (Round your answer to three decimal places.) 5- (g) Find a 90% confidence interval for the annual salary of an individual with x-9 job changes. (Round your answers to two decimal places.) lower limit upper limit thousand dollars thousand dollars (h) Test the daim that the slope of the population least-squares line is positive at the 5% level of significance. (Round your test statistic to three decimal places t- Find or estimate the P-value of the test statistic. OP-value> 0.250 O 0.125 < P-value < 0.250 0.100 < P-value < 0.125 0.075 < P-value < 0.100 0.050 < P-value < 0.075 0.025 < P-value < 0.050 0.010 < P-value < 0.025 O 0.005 < P-value < 0.010 0.0005 < P-value < 0.005 OP-value < 0.0005 Condusion Reject the null hypothesis. There is sufficient evidence that > 0. Reject the null hypothesis. There is insufficient evidence that > 0. O Fall to reject the null hypothesis. There is sufficient evidence that > 0. Fall to reject the null hypothesis. There is insufficient evidence that > 0. (1) Find a 90% confidence interval for and interpret its meaning. (Round your answers to three decimal places.) lower limit upper limit Interpretation O For each less job change, the annual salary increases by an amount that falls outside the confidence interval. O For each less job change, the annual salary increases by an amount that falls within the confidence interval. O For each additional job change, the annual salary increases by an amount that falls outside the confidence interval. For each additional job change, the annual salary increases by an amount that falls within the confidence interval.

Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015

1st Edition

ISBN:9781680331141

Author:HOUGHTON MIFFLIN HARCOURT

Publisher:HOUGHTON MIFFLIN HARCOURT

Chapter11: Data Analysis And Displays

Section: Chapter Questions

Problem 10CT

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