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Revenue passenger-miles are calculated by multiplying the number of paying passengers by the distance flow n in thousands. The accompanying table shows a portion of monthly data on revenue passenger miles (in millions) from January 2006 through September 2010; the full data set can be found on the text website, labeled Revenue Passenger-Miles.
a. Plot the above series and comment on its trend and seasonal variations.
b. Compute seasonal indices and use them to seasonally adjust the series.
c. Fit the appropriate trend model to the seasonally adjusted series.
d. Use decomposition analysis to make monthly forecasts for the last three months of 2010.
Suppose the garden had pests. What is the probability the gardener used nothing?- Suppose the gardener used chemicals. What is the probability there were pests?
Some families making under $96,000 per year are eligible for health care subsidies. All who are eligible for subsidies are required to purchase insurance. So, some families making under $96,000 per year are required to purchase insurance.
What is the regression formula - how reliable do you think the estimates will be based on this formula? Explain your answer by citing the relevant metrics.
the following summary table presents the results from a repeated-measures anova comparing three treatment conditions
the probability of a roulette ball landing on black is approximately 47.4. find the probability that the ball lands on
A random sample of 46 accounts yields x‾ = $16.50 and s = $2.20. Give a 95% confidence interval for the average amount of an account.
After the presidential debates, a random sample of 1200 voters showed that 540 favored the Democratic candidate; 480 were in favor of the Republican candidate; 40 were in favor of the Independent candidate, and 140 were undecided. At a 1% level of..
In a statistics lecture, students are asked whether or not they enjoyed doing statistics. Random sample of 50 students was taken and 30 of them said that they enjoyed doing statistics.
Determine the procedure name and parameters involved for each problem (use the Stat 200 Formulas and Techniques Summary document.) Specify the ‘key words' found in the problem that lead you to this choice.
The National Safety Council reported that air bag-related fatalities dropped to 18 in the year 2000. Compute the expected number of air bag-related fatalities.
The gambler de Mere asked Pascal whether it is more likely to get at least one six in 4 rolls of a die, or to get at least one double-six in 24 rolls.
If the SBA wants to estimate mean annual sales to within $1000 with a probability of 0.90, how large a sample should be chosen?
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