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You are given an annual time series with 40 consecutive values and asked to fit a fifth-order autoregressive model.
(a) How many comparisons are lost in the development of the autoregressive model?
(b) How many parameters do you need to estimate?
(c) Which of the original 40 values do you need for forecasting?
(d) State the fifth-order autoregressive model.
(e) Write an equation to indicate how you would forecast j years into the future.
A 'good' correlation is data-context driven. For example, I did a project correlating sales volume per state and customer demographics (pretty 'hard' data) and got a .92 correlation.
Calculate the z - scores for the three samples, compare the z score to the t-statistic, is the null hypothesis accepted or rejected?
Calculate descriptive statistics for each stock and the S&P 500. Comment on your results. Which stocks are the most volatile? Calculate the value of beta for each stock.
Compute the 99% confidence interval for the percentage of packages that are delivered damaged in the population.
Determine the probability that their SAT scores will differ by more than 50 points?
The average score for the sample is M = 76. For the general population of college students, writing scores form a normal distribution with a mean of µ = 70.
Soft Drinks a vending machine automatically pours soft drinks into cups. As the amount of soft drink dispensed into a cup is normally distributed
The following time series data represent the yearly amounts spent on advertising (in millions of dollars) by a large toy company:
Explain briefly and in nontechnical language what "a significant difference (P
A local consultant randomly selects a sample of 36 meals whose mean price is determined to be $8.75. Assuming that σ = $0.75, calculate a 95% confidence interval for the population mean price.
What are the null and alternative hypotheses in this situation?
In Excel, which of the following functions is used to conduct a hypothesis test (using the p -value) for a population variance
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