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Although it appears that price helps explain consumption, the scatterplot seems to show some nonlinear patterns. Find the residuals from your regression in (b) and plot them against time. Connect the successive points by line segments to help see the pattern. Are there systematic effects of time remaining after we regress consumption on price?
The Wilcoxon signed rank test is computed for the data and gives a value W + = 161.5. Using the Normal approximation (without the continuity correction) the P-value.
A jar contains 2 black marbles and 8 white marbles. If you randomly pick 2 marbles without replacement, what is the probability that you get one marble of each color?
If a baseball player's batting average is 0.340 or 34%, find the probability that the player will have a bad season and only score at most 60 hits in 200 times at bat?
How many drinks do we have to sample if we wish the length of the 95% confidence interval of the mean to be 0.1 ounce?
The dealership would now like some general information based on the entire sample of vehicles. Calculate and explain the following:
A sample of 400 individuals participated in the taste test and 80 indicated they like the taste. At a 5% significance level, test to determine if at least 22% of the population will like the new soft drink.
It conducts a telephone poll of 300 randomly selected households in the area and finds that 96 have VCRs. The p-value associated with the test statistic in this problem is approximately equal to?
City government has collected the following data on annual sales tax collections and new car registrations: Determine the least squares regression equation.
The final grades given by two professors in introduction to operations research course have been carefully examined. The students in the first professor's class had a grade point average of 3.0 and a standard deviation of 0.2.
What is the correlation between student cumulative GPA and the numbers of hours spent on school work each week? Be sure to include the computations.
Elucidate the null and alternative hypothesis for the difference among the two means. In testing the difference between the means of two.
Suppose that nine additional firms will be added to the bankruptcy rolls during the next quarter. How many of those failures are likely to be attribute to fraud?
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