Online Access Free CBDA Exam Questions

A large number of text messages are received by Twitter each year making Twitter one example of Big Data.
What data characteristic represents this large number of text messages?

• A.Variety
• B.Value
• C.Veracity
• D.Velocity

A pharmaceutical company is conducting research to determine whether a new medicine in development is more successful in reducing the pain associated with rheumatoid arthritis then their current drug in the market.
A group of volunteers are selected for the research. One set of participants is provided the existing drug while a second set of participants is given the new drug.Which technique is being applied?

• A.Natural experiment
• B.Block design
• C.A/B testing
• D.Observational design

An analytics team is interested in reviewing the results of a public opinion poll that is going to be conducted at the end of the month. One of the factors the team is interested in, is ensuring the result set is statistically significant. Why would this factor be important to the team?

• A.Ensure that results are not biased or random
• B.Improve the likelihood of receiving a response rate of 100%
• C.Guarantee that the objectives of the poll are met
• D.To make sure the criteria for the target audience is met

A marketing department has established an analytics team. The analytics practice is stand-alone and analysts have limited insights into corporate strategy. Which is an expected result for analytics practices operating at the business unit level?

• A.Insights derived from data analysis will be used to guide strategic decisions
• B.The organization will use analytics as a means to obtain a competitive advantage
• C.The analytics team may conduct analysis that is of minimal value to the organization
• D.Analytics work will be driven by the organization's business plan

When reviewing the results of their analysis, the team is determining if the data supports their hypothesis and can be presented to decision makers. They are reviewing measures of variation, sample size and statistical significance. They realize that the p-value of 0.02 is lower than the initial target.This clearly indicates the team can:

• A.Reject the null hypothesis and reject the alternative
• B.Reject the null hypothesis in favor of the alternative
• C.Accept the null hypothesis and accept the alternative
• D.Accept the null hypothesis and reject the alternative