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1. Fit the saturated regression of the number of projects per 1,000 on the variables defined in the next 33 columns of the data table (Pct Added Housing Sq Ft through Income [per cap] 2000).
(a) Why is this model difficult to interpret?
(b) How accurately will this model predict new locations?
2. Apply forward stepwise regression to build a more parsimonious model from this collec- tion of potential explanatory variables. Be sure to avoid over-fitting. Interpret, if you can, the model obtained by stepwise. Is collinearity a problem?
We want to test the hypothesis about fairness of spinning the coin. Evaluate the true proportion of heads. Use 95% confidence interval. Do not forget to check conditions first.
On the fictitious game show "Marginal Analysis for Everyone" the host subjects contestants to unusual tests of mental skill. On one, a contestant may choose one of two identical envelopes labeled A and B, each of which contains an unknown amount o..
question out of forty students there are 14 who are taking physics and 29 who are taking calculus. what is the
let x denote a geometric random variable with parameter p. for s gt0 compute ee-sx. for what other values of s is your
Her results (in hours until turning a particular shade of brown) are in the table below. At ∞= .01, did she see a difference between the two treatments?
a pet supplier has a stock at parakeets of which 10 are blue parakeets. a pet store orders 3 parakeets from this
In order to run a linear regression, the following assumption(s) have to be met:
If the sample size had been 15 rather than 40, could the probability requested in part (a) be calculated from the given information?
these cars would fall into the 22 to 27 mpg range? Compute the proportion of cars that get more than 28 mpg. What proportion of cars would get less than 23 mpg?
Explain what is meant when we speak of interaction between attributes. Why would the additive utility function from Chapter 15 be inappropriate if two attributes interact?
the average length of corn snakes in okoboji is supposedly 20 inches and the standard deviation is known to be 3.3
an automatic hopper car loader is set to put 75 tons of coal into each car. the actual weights of coal loaded into each
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