D-DS-FN-23 試験問題を無料オンラインアクセス

Which word or phrase completes the statement; "Excessive emphasis color is to Bar chart as
__________________."?

• A.Multicollinearity is to serial correlation
• B.Multicollinearity is to OLS
• C.Confidence is to leverage
• D.Confidence interval is to regression

You have the data from a popular e-commerce website. You are exploring the time spent (in seconds) on the website by 100,000 customers across 14 different product categories.
What visualization can be used to represent the relationship between time spent and product category?

• A.Scatter plot
• B.Box and whisker plot
• C.Rug plot
• D.Hexbin plot

Consider this SQL statement: SELECT product, avg(prod_cost) FROM product_detail GROUP BY product.
The GROUP BY clause implies what type of function?

• A.Window function
• B.Aggregate function
• C.User defined function
• D.System function

In K-means clustering, what is a graph of the WSS versus the value of K used to help determine?

• A.Average distance between clusters
• B.Optimal distance between clusters
• C.Average distance between observations
• D.'Optimal number of clusters

Which visualization technique should be avoided?

• A.Using tables of numbers to present all of the data visually
• B.Achieving a high data-ink ratio
• C.Using a small number of contrasting colors to draw distinctions
• D.Using visuals to illustrate key points