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Question 86/147
Executives want to determine whether a change in a shopping rewards program has been effective in getting customers to increase their spending. Which approach could be used to determine if a significant shift in spending has occurred?
Correct Answer: A
Hypothesis testing is the appropriate approach to determine whether a significant shift in spending has occurred. By comparing pre- and post-program spending, hypothesis testing can assess if the observed changes are statistically significant.
- Question List (147q)
- Question 1: What is a motivation for using a data analytics lifecycle?...
- Question 2: You have created a Logistic Regression model to predict cust...
- Question 3: Your organization has a website where visitors randomly rece...
- Question 4: What is a business driver for Big Data analytics adoption?...
- Question 5: You have been assigned to run a logistic regression model fo...
- Question 6: In MADlib what does MAD stand for?...
- Question 7: Which process in text analysis can be used to reduce dimensi...
- Question 8: Since R factors are categorical variables, they are most clo...
- Question 9: You have been assigned to run a linear regression model for ...
- Question 10: In which lifecycle stage are initial hypotheses formed?...
- Question 11: What is the similarity between the matrix and array data str...
- Question 12: Which activity is performed in the Operationalize phase of t...
- Question 13: Which participant in a data analytics project is typically r...
- Question 14: What is an appropriate data visualization to use in a presen...
- Question 15: After running a density plot you realize that the data has a...
- Question 16: You have run the association rules algorithm on your data se...
- Question 17: While having a discussion with your colleague, this person m...
- Question 18: Refer to the exhibit. (Exhibit) You are using K-means cluste...
- Question 19: Before building an ARMA model, how can you determine if the ...
- Question 20: The web analytics team uses Hadoop to process access logs. T...
- Question 21: Refer to the exhibit. (Exhibit) You are using k-means cluste...
- Question 22: What requests resources from YARN during a MapReduce job?...
- Question 23: When would you use GROUP BY ROLLUP clause in your OLAP query...
- Question 24: After which phase of the data analytics lifecycle should you...
- Question 25: What does the Receiver Operating Characteristic (ROC) curve ...
- Question 26: Consider a database with the following four transactions: Tr...
- Question 27: The web analytics team uses Hadoop to process access logs. T...
- Question 28: What does the R code z <- f[1:10, ] do?...
- Question 29: Refer to the exhibit. (Exhibit) You are building a decision ...
- Question 30: Which chart type is the most effective way to show trends ov...
- Question 31: Which two analytical methods can be used for dealing with ca...
- Question 32: A call center for a large electronics company handles an ave...
- Question 33: You are asked to create a model to predict the total number ...
- Question 34: (Exhibit) Refer to the exhibit. To predict whether or not a ...
- Question 35: What is a key consideration when preparing a presentation in...
- Question 36: Consider the following SQL statement: SELECT employee_id, ye...
- Question 37: You have been assigned to perform a study of the daily reven...
- Question 38: You need to run a hypothesis test across three normally dist...
- Question 39: Which word or phrase completes the statement; "Excessive emp...
- Question 40: Refer to the exhibit. (Exhibit) What is the approximate R-sq...
- Question 41: What is part of the model output for a linear regression?...
- Question 42: You submit a Map Reduce job to a Hadoop cluster. However, yo...
- Question 43: When is the GROUP BY ROLLUP clause used in an OLAP query?...
- Question 44: A data scientist is given an R data frame, "empdata", with t...
- Question 45: In a Student's t-test, what is the meaning of the p-value?...
- Question 46: You are analyzing a time series and want to determine its st...
- Question 47: What is the purpose of applying the naive Bayes conditional ...
- Question 48: How is HDFS defined?
- Question 49: What is one modeling or descriptive statistical function in ...
- Question 50: In time series analysis, what function is examined to identi...
- Question 51: What describes the data repository represented by the 'A' in...
- Question 52: Which R data structure allows elements to have different dat...
- Question 53: Which chart type is intended to display correlations between...
- Question 54: Which word or phrase completes the statement? Business Intel...
- Question 55: In logistic regression modeling, what is the commonly assign...
- Question 56: Refer to the exhibit. (Exhibit) You have scored your Naive b...
- Question 57: What is the output of the K-means clustering algorithm?...
- Question 58: What is a characteristic of an analytic sandbox?...
- Question 59: In text analysis, what makes the corpus representation dynam...
- Question 60: A data scientist plans to classify the sentiment polarity of...
- Question 61: Refer to the exhibit. (Exhibit) The graph represents an ROC ...
- Question 62: When creating a project sponsor presentation, what is the ma...
- Question 63: (Exhibit) Refer to the exhibit. What is the approximate R-sq...
- Question 64: You have run a Linear Regression model on the data shown in ...
- Question 65: A data scientist is given an R data frame (i.e., empdata) wi...
- Question 66: You have been assigned to run a Logistic Regression model fo...
- Question 67: A data scientist is asked to implement an article recommenda...
- Question 68: Which phase of the data analytic lifecycle includes conducti...
- Question 69: Refer to the exhibit. (Exhibit) After analyzing a dataset, y...
- Question 70: What is the format of the output from the Map function of Ma...
- Question 71: Refer to the exhibit. (Exhibit) What provides the decision t...
- Question 72: Refer to the exhibit. (Exhibit) In the exhibit, a correlogra...
- Question 73: In time series analysis, what statement describes a MA(q) pr...
- Question 74: The graphic shows the values for the input Boolean attribute...
- Question 75: If your intention is to show trends over time, which chart t...
- Question 76: In ANOVA, what is the null hypothesis for k population means...
- Question 77: MapReduce is designed to process data in which way?...
- Question 78: Data has been collected on visitors' viewing habits at a ban...
- Question 79: The graph represents the plot of WSS as a function of K for ...
- Question 80: What is the primary role of a business intelligence analyst ...
- Question 81: Which data type value is used for the observed response vari...
- Question 82: Which word or phrase completes the statement? Unix is to bas...
- Question 83: Which SQL OLAP extension provides all possible grouping comb...
- Question 84: You are assigned the task of creating customer profiles for ...
- Question 85: What action occurs during feature selection in the model bui...
- Question 86: Executives want to determine whether a change in a shopping ...
- Question 87: In a t-test with unknown variance, what values are used to c...
- Question 88: A logistic regression model is built to determine the probab...
- Question 89: What metrics are used to help calculate relevance in text an...
- Question 90: Which component of a final presentation focuses on how to de...
- Question 91: In which programming language is Hadoop written?...
- Question 92: Which analytic technique would be appropriate to estimate bl...
- Question 93: You have fit a decision tree classifier using 12 input varia...
- Question 94: What converts SQL-like commands into either Tez, Spark, or M...
- Question 95: A fair six-sided die is rolled. Let A denote the event that ...
- Question 96: Based on the exhibit, the table shows the values for the inp...
- Question 97: Which characteristic applies mainly to Data Science as oppos...
- Question 98: You have been assigned to do a study of the daily revenue ef...
- Question 99: What is a key consideration when preparing a presentation in...
- Question 100: Which Hadoop service responds to requests for compute and me...
- Question 101: In addition to quantitative and technical skills, what is a ...
- Question 102: What is a core deliverable at the end of the analytic projec...
- Question 103: Trend, seasonal, and cyclical are components of a time serie...
- Question 104: What is a distinct property of Logistic Regression compared ...
- Question 105: In a Logistic Regression, the coefficient for "age" equals -...
- Question 106: In data visualization, what is used to focus the audience on...
- Question 107: The average purchase size from your online sales site is $17...
- Question 108: There are three criterions for big data analytics projects w...
- Question 109: Consider this SQL statement: SELECT product, prod_cost, avg(...
- Question 110: You are using k-means clustering to classify heart patients ...
- Question 111: Refer to the exhibit. (Exhibit) Click on the calculator icon...
- Question 112: Refer to the exhibit. (Exhibit) You are asked to write a rep...
- Question 113: What is the primary bottleneck in text classification?...
- Question 114: Which activity might be performed in the Operationalize phas...
- Question 115: An IT department deployed a spam filter to reduce the amount...
- Question 116: Which function shown in the exhibit is used to calculate the...
- Question 117: Which statement about linear regression is correct?...
- Question 118: You have been assigned to do a study of the daily revenue ef...
- Question 119: Refer to the exhibit. (Exhibit) In the exhibit, a correlogra...
- Question 120: Refer to exhibit. (Exhibit) You are asked to write a report ...
- Question 121: What are two data categories that represent quantitative dat...
- Question 122: Refer to the exhibit. (Exhibit) In association rules, for it...
- Question 123: Which activity is performed in the Operationalize phase of t...
- Question 124: You are provided with a dataset with the following attribute...
- Question 125: Match each task to its description. (Exhibit)...
- Question 126: Consider the following text: "Stop!" he shouted. "Don't go t...
- Question 127: Which graphical representation shows the distribution and mu...
- Question 128: You are having a discussion with a business colleague. The c...
- Question 129: Assume that you have a data frame in R. Which function would...
- Question 130: A data scientist wants to predict the probability of death f...
- Question 131: You have been given a task to improve sales force compensati...
- Question 132: What are the two data categories that represent qualitative ...
- Question 133: Which functionality do regular expressions provide?...
- Question 134: Consider the example of an analysis for fraud detection on c...
- Question 135: Which data asset is an example of semi-structured data?...
- Question 136: Which analytical method is considered unsupervised?...
- Question 137: How does an HBase data structure differ from an ANSI standar...
- Question 138: What provides the means for matching and manipulating text s...
- Question 139: What is the optimal usage scenario for the Hadoop Distribute...
- Question 140: You have created a scatterplot of two continuous variables f...
- Question 141: Your customer provided you with 2, 000 unlabeled records and...
- Question 142: You have been assigned to do a study of the daily revenue ef...
- Question 143: What is a consideration when building decision trees?...
- Question 144: What are challenges presented by Big Data?...
- Question 145: You have two tables of customers in your database. Customers...
- Question 146: Which visualization technique should be avoided?...
- Question 147: Consider the following text: "Aren't you glad that there are...
