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(a) Test the regression model for significance of regression. Using a = 0.05, find the P-value for the test and draw conclusions.
(b) Evaluate the contribution of each regressor to the model using the t-test with a = 0.05.
(c) Fit a new model to the response PITCH using new regressors x1 = SOAKTIME SOAKPCT and x2 = DIFFTIME DIFFPCT.
(d) Test the model in part (c) for significance of regression using a = 0.05. Also calculate the t-test for each regressor and draw conclusions.
(e) Estimate s2 for the model from part (c) and compare this to the estimate of 2 for the model in part (a). Which estimate is smaller? Does this offer any insight regarding which model might be preferable?
A study describes operating costs for comparable manufacturing plants operating in 15 different U.S. metropolitan areas. From the costs obtained in the study, the following multiple regression equation was developed:
The Dean is hanging his head in shame. He realizes his failings in designing an adequate research design to assess the effects of the move on majors and has revised the proposal.
q1. mimi was the 5th seed in 2012 umuc tennis open that took place in august. in this tournament she won 83 of her 100
How many bolts should be sampled in order to make us 95% confident that the sample mean bolt length is within .02 inches of the true mean bolt length?
Suppose an airport scanning device has 98% accuracy in detecting certain kinds of metal objects (98% of people carrying these objects are correctly identified as carriers and 98% of people not carrying them are correctly identified as non-carriers..
retired workers and disabled workers both receive social security benefits. what information would we need to test the
Evaluate probabilities using the laws of probability, the standard normal distribution, t-distribution, or X2-distribution.
Pretend that you are a Finance person in a large dynamic company. Your dream is to become CFO someday, so you want to make good financial decisions.
a missile guidance system has five fail-safe components. the probability of each failing is 0.05. find these
Meagan Dubean manages a portfolio of 200 common stocks. Her staff classified the portfolio stocks by 'industry sector' and 'investment objective. If x is a binomial random variable with n=8 and p=0.6, what is the probability that x is equal to 4?
Find the sample space for the number of outcomes (you don't need to list the possible outcomes, just how many possible outcomes there are).
Compute a 95% confidence interval for the population mean, based on the sample 1, 2, 3, 4, 5, 6, and 30. Change the number from 30 to 10 and recalculate the confidence interval.
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