21. A candy manufacturer finds an even distribution of sales across all age ranges of customers who purchase their products. The manufacturer decides to conduct a survey to learn more about its customer base. Due to age requirements, they can only send the survey to customers who are 21 years or older. This scenario can be described as what?
- Down sampling bias
- Sampling bias
- Unbiased sampling
- Upsampling bias
22. What best describes a sample size?
- A subset of the population between the 25th and 50th percentile
- A random subset of the population
- A subset that is representative of the population as a whole
- A subset of the population excluding outliers
23. Fill in the blank: In order to have a strong and thorough analysis, a data analyst must verify _____.
- data replication
- data manipulation
- data engineering
- data integrity
24. Fill in the blank: _____ is the process of changing data to make it more organized and easier to read.
- Data transfer
- Data manipulation
- Data gathering
- Data replication
25. You are working for a global technology company. You have a dataset with the company’s total cell phone sales by country from 2015 to present. Based on the data you have, what questions are you able to answer?
- What was the effect on sales when a new phone model was launched?
- What was the effect on sales when new phone features were introduced?
- What countries have the most cell phone sales in the past three years?
- What are the mean cell phone sales for each country since 2010?
26. A data analyst, working for a publishing company, gathers a dataset which includes all books sold in the United Kingdom over the last three years. However, they decide to generate new data that represents global book sales. What type of insufficient data does this scenario describe?
- Data that keeps updating
- Data that is outdated
- Data that is geographically limited
- Data from only one source
27. A company is trying to learn more about their customer base. They would like to conduct a survey to understand why their customers chose their brand. How should the company survey its customers?
- Conduct a survey of customers who purchased a different brand
- Conduct a survey of customers that live in high-income areas
- Conduct a survey with a representative sample of their customer population
- Conduct a survey with customers who have purchased more than five products
28. Sometimes during analysis, an analyst discovers that it’s necessary to adjust the business objective. When this happens, the analyst should take the initiative to do so without involving others in order to be respectful of their time.
- True
- False
Shuffle Q/A 3
29. A car dealership gathers data about their entire customer population. They decide to conduct a survey to understand why their customers chose their dealership. They send out an email to all customers who have purchased more than two vehicles in the past five years. What does this scenario describe?
- Unbiased sampling
- Geographically limited sampling
- Random sampling
- Sampling bias
30. A data analyst needs to migrate data from a server located at their company's headquarters to a remote site. This can lead to what type of data integrity issue?
- Data replication
- Data cleaning
- Data transfer
- Data manipulation
