You have used k-means clustering to classify behavior of 100, 000 customers for a retail store.
You decide to use household income, age, gender and yearly purchase amount as measures. You have chosen to use 8 clusters and notice that 2 clusters only have 3 customers assigned. What should you do?

Which analytical method is considered unsupervised?

On analyzing your time series data you suspect that the data represented as y1, y2, y3, … , yn-1, yn may have a trend component that is quadratic in nature. Which pattern of data will indicate that the trend in the time series data is quadratic in nature?

Which key role for a successful analytic project can provide business domain expertise with a deep understanding of the data and key performance indicators?

Consider a scale that has five (5) values that range from not important to very important. Which data classification best describes this data?

Which word or phrase completes the statement? Business Intelligence is to monitoring trends as Data Science is to ________ trends.

The average purchase size from your online sales site is $17, 200. The customer experience team believes a certain adjustment of the website will increase sales. A pilot study on a few hundred customers showed an increase in average purchase size of $1.47, with a significance level of p=0.1.
The team runs a larger study, of a few thousand customers. The second study shows an increased average purchase size of $0.74, with a significance level of 0.03. What is your assessment of this study?

When creating a project sponsor presentation, what is the main objective?

Which functionality do regular expressions provide?

Data visualization is used in the final presentation of an analytics project. For what else is this technique commonly used?