Exam (elaborations)
Exam 3 QMB3250 UF With Questions And 100% ALL CORRECT ANSWERS 2024/2025
- Course
- Institution
Exam 3 QMB3250 UF With Questions And 100% ALL CORRECT ANSWERS 2024/2025
[Show more]
Seller
Follow
Content preview
Exam 3 QMB3250 UFSmoother - ANSFor Simple moving average, longer periods are _________ than shorter
periods.
Smoother or less smooth
Simple Moving Average - ANSCreates a new time series from the original data by averaging
adjacent values.
helps illuminate how the data is varying over time.
Affected by outliers and peaks.
Doesn't work well when there are strong seasonal, trend or cyclical components.
Simple exponential smoothing - ANSvalues that are closest to the estimated value get the most
weight in the moving average and values that are farther away get less.
adjust weight between recent and historic data.
Smoother - ANSA smaller a (alpha) would be __________________.
Smoother or more flat or less smooth
Autoregressive models - ANSTime series where we add in columns containing lags.
Good for quarterly lag.
Multiple Regression Models - ANSWe can cautiously predict a little further away from the data.
Better at fitting series that have trend, cyclical, and seasonal components.
Linear
- Additive: SLR
- Exponential: SLR but log(y)
Quarters: Add indicator variables
Random walk - ANSthe best prediction is the most recent point. Time series.
Sometimes described as white noise.
One way ANOVA - ANSAllow us to compare two or more means.
Ho: M1 = M2 = Mk (No difference in treatments)
Ha: At least one population mean is different from the rest.
exogenous variable - ANSan extra variable added to help predict this cyclical trend.
sum of squares treatment - ANSestimates how much the means vary.
gets bigger by adding another group.
sums of squares error - ANSestimates how much variation there is within each group.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller studyfinals. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
77254 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now