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Understand autocorrelation and multicollinearlity in reference to the following questions. What type of regression is it common in? When is it likely to occur? What is its negative impact? How do we see if it exists? If found, how is it eliminated?
A doctor believes that the standard deviation of systolic blood pressure is 450. A random sample of 24 patients found a standard deviation of 520. Assume the variable is normally distributed and a = 0.01. What are the critical values?
If the coefficient of correlation is 0.4, the percentage of variation in the dependent variable explained by the variation in the independent variable
Calculate a 95% confidence interval for the population mean, based on the sample 10, 12, 13, 14, 15, 16, and 49. Change the number from 49 to 16 and recalculate the confidence interval. Using results, explain the effect of an outlier or extreme ..
For each of the following, indicate whether or not you would expect it to have a strong seasonal component and why.
Make a point estimate and a 95% confidence interval estimate.
Write down the name of 4 parts of the regression equation.
One advantage of the repeated measures ANOVA is that it eliminates "individual differences" as a source of variability. Explain why there are no individual differences in the numerator and in the denominator of the F ratio.
A firm has tendered for two independent contracts. It estimates that it has probability 0.4 of obtaining contract A, and probability 0.1 of obtaining contract B. Find the probability that the firm:
The firm has already decided that any sample mean below 78 or above 82 will signal the workers that the process is not working properly.
Test the equality of the means of three populations.
A university club consists of 4 men and 6 women. Two members are chosen at random without replacement. Let X = 0 if first person chosen is male, 1 if first person chosen is female. Y = 0 if second person chosen is male, 1 if second person chosen i..
A certain state lottery awards 418 prizes; 28-$200 prizes, 120-$25 prizes and 270-$20 prizes, for every 10,000 tickets sold.
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