Before you build an ARMA model, how can you tell if your time series is weakly stationary?
Before you build an ARMA model, how can you tell if your time series is weakly stationary?
When would you prefer a Naive Bayes model to a logistic regression model for classification?
When would you prefer a Naive Bayes model to a logistic regression model for classification?
Which tool should they use to export the structured data from Hadoop?
The web analytics team uses Hadoop to process access logs. They now want to correlate this data with structured user data residing in their massively parallel database. Which tool should they use to export the structured data from Hadoop?
In MADlib what does MAD stand for?
In MADlib what does MAD stand for?
Which combination of subtotals do you expect to be returned by the query?
Review the following code:
SELECT pn, vn, sum(prc*qty)
FROM sale
GROUP BY CUBE(pn, vn)
ORDER BY 1, 2, 3;
Which combination of subtotals do you expect to be returned by the query?
In R, functions like plot() and hist() are known as what?
In R, functions like plot() and hist() are known as what?
What does the R code z <- f[1:10, ] do?
What does the R code z <- f[1:10, ] do?
Which tool should they use?
The web analytics team uses Hadoop to process access logs. They now want to correlate this data with structured user data residing in a production single-instance JDBC database. They collaborate with the production team to import the data into Hadoop. Which tool should they use?
Which query interface would you recommend?
Your colleague, who is new to Hadoop, approaches you with a question. They want to know how best to access their data. This colleague has a strong background in data flow languages and programming.
Which query interface would you recommend?
Which type of numeric value does a logistic regression model estimate?
Which type of numeric value does a logistic regression model estimate?