Chapter 13, Problem 13.61CRP

The data below is for a hypothetical study investigating the Systolic Blood Pressure (SBP) of construction workers. The table shows respective measurements of 20 workers along with hours of work per day and the area of the city the work took place. [You can use Excel-Data Analysis – Regression or http://vassarstats.net/multU.html] SBP Hrs/day Area 109.6 7 east 107.4 8 east 140.3 9 east 146.5 12 east 98.2 6 east 137.8 9 east 124.1 10 east 113.2 8 east 127.8 9 east 125.3 8 east 108.5 6 west 181.3 13 west 137.4 10 west 146.2 10 west 142.4 9 west 123.7 8 west 129.6 8 west 143.6 9 west 160.7 11 west 148.3 9 west   a) What is the regression equation?   b) Interpret the meaning of the slopes in this problem.   d)  At the 0.05 level of significance, determine whether each independent variable makes a contribution to the…

The owener of a winery collects data on competing wineries every year.  He would like to predict the gross sales (in number of cases) from the size of the wineries (in acres). What is the explanatory variable in this study?

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Hello, I would like to get help with d, e and f please. Thank you.

The follow table gives the approximate economic value associated with various levels of oil recovery in Texas. Find the regression line, and use it to estimate the economic value associated with a recovery level of 70%.

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You are an analysis for a hot chocolate company, and want to investigate how weekly product sales are impacted by the current temperature. You investigate weekly sales data and average temperature for a particular region of customers over 77 weeks. You create a linear regression model to predict weekly sales. The model has residual standard deviation (8e) of 3380 and a 8 of 6.5. The regression slope you get in your model is 109. Using this information, create a hypothesis test to investigate if the population regression slope of your model is not equal to zero. What is the value of the test statistic of your analysis? Note: 1- Only round your final answer. Round your final answer to two decimal places. Your Answer: Answer

You are an analysis for a hot chocolate company, and want to investigate how weekly product sales are impacted by the current temperature. You investigate weekly sales data and average temperature for a particular region of customers over 77 weeks. You create a linear regression model to predict weekly sales. The model has residual standard deviation (Se) of 3360 and a S of 8.3. The regression slope you get in your model is 106. Using this information, create a hypothesis test to investigate if the population regression slope of your model is not equal to zero. What is the value of the test statistic of your analysis? Note: 1- Only round your final answer. Round your final answer to two decimal places.

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