In which lifecycle stage are appropriate analytical techniques determined?

What is Hadoop?

You are using k-means clustering to classify heart patients for a hospital. You have chosen Patient
Sex, Height, Weight, Age and Income as measures and have used 3 clusters. When you create a
pair-wise plot of the clusters, you notice that there is significant overlap between the clusters.
What should you do?

How does Pig’s use of a schema differ from that of a traditional RDBMS?

You are provided four different datasets. Initial analysis on these datasets show that they have
identical mean, variance and correlation values. What should your next step in the analysis be?

You are asked to create a model to predict the total number of monthly subscribers for a specific
magazine. You are provided with 1 year’s worth of subscription and payment data, user
demographic data, and 10 years worth of content of the magazine (articles and pictures). Which
algorithm is the most appropriate for building a predictive model for subscribers?

Which word or phrase completes the statement? Structured data is to OLAP data as quasistructured data is to____

What describes a true property of Logistic Regression method?

You have been assigned to do a study of the daily revenue effect of a pricing model of online
transactions. You have tested all the theoretical models in the previous model planning stage, and
all tests have yielded statistically insignificant results. What is your next step?

A data scientist is asked to implement an article recommendation feature for an on-line magazine.
The magazine does not want to use client tracking technologies such as cookies or reading
history. Therefore, only the style and subject matter of the current article is available for making
recommendations. All of the magazine’s articles are stored in a database in a format suitable for
analytics.
Which method should the data scientist try first?