3.5.Course challenge - sj50179/Google-Data-Analytics-Professional-Certificate GitHub Wiki

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Scenario 1, questions 1-5

You’ve been working at a data analytics consulting company for the past six months. Your team helps restaurants use their data to better understand customer preferences and identify opportunities to become more profitable.

To do this, your team analyzes customer feedback to improve restaurant performance. You use data to help restaurants make better staffing decisions and drive customer loyalty. Your analysis can even track the number of times a customer requests a new dish or ingredient in order to revise restaurant menus.

Currently, you’re working with a vegetarian sandwich restaurant called Garden. The owner wants to make food deliveries more efficient and profitable. To accomplish this goal, your team will use delivery data to better understand when orders leave Garden, when they get to the customer, and overall customer satisfaction with the orders.

Before project kickoff, you attend a discovery session with the vice president of customer experience at Garden. He shares information to help your team better understand the business and project objectives. As a follow-up, he sends you an email with datasets.

Click below to read the email:

C3 Scenario 1_Client Email .pdf

And click below to access the datasets:

Course 3 Final Challenge Data Sets - Customer survey data (1).csv

Course 3 Final Challenge Data Sets - Delivery times_distance (1).csv

Question 1

Reviewing the data enables you to describe how you will use it to achieve your client’s goals. First, you notice that all of the data was collected by Garden employees using their own resources. What type of data does this describe?

  • Third-party data
  • First-party data
  • Qualitative data
  • Nominal data

Correct. This describes first-party data, which is collected by an individual or group using their own resources.

Question 2

Next, you review the customer satisfaction survey data:

You may click the link to create a copy of the dataset: Customer Satisfaction Survey data.

The question in column E asks, “Was your order accurate? Please respond yes or no.” What kind of data is this?

  • Ordinal data
  • Second-party data
  • Boolean data
  • Clean data

Correct. This is Boolean data, which has only two possible values, such as yes or no.

Question 3

Now, you review the data on delivery times and the distance of customers from the restaurant:

You may click the link to create a copy of the dataset: Delivery Times/Distance

Fill in the blank: The data in column E is an example of _____ data. Select all that apply.

  • continuous
  • qualitative
  • discrete
  • quantitative

Correct. This is an example of discrete data, which is counted and has a limited number of values. It is also quantitative data, which is specific and measures numerical facts.

Question 4

The next thing you review is the file containing pictures of sandwich deliveries over a period of 30 days. This is unstructured data, which means what?

  • It’s objective and measures facts.
  • It’s not organized in an easily identifiable manner.
  • It’s collected by a group directly from its audience and then sold.
  • It’s organized in a certain format.

Correct. Unstructured data is not organized in an easily identifiable manner.

Question 5

Now that you’re familiar with the data, you want to build trust with the team at Garden.

What actions should you take when working with their data? Select all that apply.

  • Share the client’s data with other delivery restaurants to compare performance.
  • Organize the data using effective naming conventions.
  • Keep the data safe by implementing data-security measures, such as password protection and user permissions.
  • Post on social media that you’re working with Garden and would like feedback from any of your contacts who have ordered there before.

Correct. You can build trust by showing a client that you will organize their data effectively and keep it safe by implementing appropriate data-security measures.

Scenario 2, questions 6-10

You’ve completed this program and are interviewing for a junior data scientist position at a company called Sewati Financial Services.

Click below to review the job description:

C3 Course Challenge Junior Data Scientist Job Description .pdf

So far, you’ve successfully completed the first interview with a recruiter. They arrange your second interview with the team at Sewati Financial Services.

Click below to read the email from the human resources director:

Course 3 Scenario 2_Second Interview Email.pdf

You arrive 15 minutes early for your interview. Soon, you are escorted into a conference room, where you meet Kai Harvey, the senior manager of strategy. After welcoming you, he begins the behavioral interview.

Question 6

Consider and respond to the following question. Select all that apply.

Our data analytics team often surveys clients to get their feedback. If you were on the team, how would you ensure the results do not favor a particular person, group of people, or thing?

  • Instruct participants to share their name and contact information.
  • Give participants enough time to answer each survey question.
  • Ensure the survey sample represents the population as a whole.
  • Make sure the wording of the survey question does not encourage a specific response from participants.

Correct. The way questions are written, the amount of time given to answer each question, and the inclusivity of the participants can help ensure survey results are unbiased.

Question 7

Consider and respond to the following question. Select all that apply.

Our data analytics team often uses external data. Where can you locate useful external data?

  • Sewati Financial Solutions marketing department
  • Other financial businesses
  • Government sources
  • A professional finance association

Correct. External data can come from a variety of places. This may include other businesses, government sources, professional associations, and more.

Question 8

Consider and respond to the following question. Select all that apply.

Our analysts often work within the same spreadsheet, but for different purposes. What tools would you use in such a situation?

  • Encrypt the spreadsheet so only you can access it
  • Sort the data to make it easier to understand, analyze, and visualize
  • Filter to show only the data that meets a specific criteria
  • Freeze the header rows

Correct. Sorting, filtering, and freezing header rows enable data analysts on the same team to use the same dataset for different purposes.

Question 9

Next, your interviewer wants to better understand your knowledge of basic SQL commands. He asks: How would you write a query that retrieves only data about people who joined our firm in 2019 from the Clients table in our database?

SELECT *
FROM Clients
WHERE start_date = '2019

Correct. To write a query that retrieves only data about people who joined the firm in 2019 from the Clients table, type SELECT * FROM Clients WHERE start_date=’2019’.

Question 10

For your final question, your interviewer explains that Sewati Financial Services cares about data privacy. The company needs its clients’ trust, and this is an important responsibility for the data analytics team.

He asks: What does data privacy involve? Select all that apply.

  • Preserving a data subject’s information and activity any time a data transaction occurs
  • A person’s legal right to their data
  • Encryption and sharing permissions
  • Putting privacy measures in place to protect people’s data

Correct. Data privacy deals with preserving a data subject’s information and activity any time a data transaction occurs, a person’s legal right to their data, and establishing privacy measures to protect people’s data.