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Are gas prices driving elections? The Chance Web site discusses the use of regression to predict the margin of victory in presidential elections since 1948 from the price of gas (in 2008 dollars). Read the article at www.causeweb.org/wiki/chance/ index.php/Chance_News_72. Use the data in the article to do the following.
(a) Fit a simple linear regression model using gas price to predict margin of victory. Do your results agree with those reported in the article?
(b) Use the incumbent party as an indicator variable (code Democrats as 1 and Republicans as 0), and add this to your simple linear regression model. What is the value of R2 ?
(c) Now add gross domestic product (GDP) to your regression model in (b). What is the value of R2 ?
Identify the explanatory variable ant the response variable - can you conclude that there is a significant linear correlation between earnings per share and dividends per share?
A college believes that 28% of applicants to that school have parents who have remarried. How large a sample is needed to estimate the true proportion of students who have parents who have remarried to within 5 percentage points with 95% confidenc..
Determine the estimated regression equation that can be used to predict the star rating given the point values for execution, ease of use, and range of offerings.
1. An analyst decided to use either the 95% t-interval for the mean or the corresponding 95% interval for the median, whichever was shorter. His sample was symmetric, so the mean and median are roughly the same in his population. What do you think..
Analysis of weekly widget production reveals that the number of widgets X produced in a week is a random variable with mean μX = 200 and standard deviation σX = 20. What are the mean and the standard deviation of C?
The adjusted R 2 was 53%.19 Carefully analyze these results and try to draw a conclu- sion about the effects of the 1985 French Banking Deregulation Act.
in a survey of 2365 adults a proportion of 1320 said they worry about zombies.a. find p and q.b. with c0.99 construct
in a tire factor the quality control inspector examines a randomly chosen sample of 15 tires. when more than one
The standard deviation of a list of numbers is a measure of how much the numbers deviate from the averag
Suppose that population variances from both conditions are equal is there evidence that treatment decreases surface hardness of steel plates?
messages are transmitted from low speed terminals and arrive at a message concentrator at a poisson rate of 600hr.
the sample space of equally likely outcomes for the experiment of rolling two fair dice is
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