Prepare Data for Exploration : weekly challenge 1

Prepare Data for Exploration : weekly challenge 1

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Are you prepared to increase your data exploration abilities? The goal of Coursera's Week 1 challenge, "Prepare Data for Exploration," is to provide you the skills and resources you need to turn unprocessed data into insightful information. With the knowledge you'll gain from this course, you can ensure that your data is organised, clean, and ready for analysis. Data preparation is one of the most important processes in any data analysis effort. Inaccurate results and flawed conclusions might emerge from poorly prepared data. You may prepare your data for exploration with Coursera's Weekly Challenge 1. You'll discover industry best practises and insider advice.

#answers #questions #flashcard

1.

Question 1

What is the most likely reason that a data analyst would use historical data instead of gathering new data?

1 / 1 point

If the data is unknown

If there is plenty of time to research historical data

If the project has a very short time frame.

If the data is constantly changing.

Correct

2.

Question 2

Fill in the blank: The number of days a month that a store is open is an example of _____ data.

1 / 1 point

clean

continuous

open

discrete

Correct

3.

Question 3

Fill in the blank: The question “Where did you vacation last year?” is an example of collecting _____ data.

1 / 1 point

nominal quantitative

real quantitative

nominal qualitative

real qualitative

Correct

4.

Question 4

Why is internal data considered more reliable and easier to collect than external data?

1 / 1 point

Internal data has much larger sample sizes.

Internal data lives within a company’s own systems.

Internal data circumvents privacy restrictions.

Internal data comes from people you know.

Correct

5.

Question 5

Data that has been organized into a certain format is known as structured data in data analysis. Which of the following are examples of structured data? Select all that apply.

1 / 1 point

An audio file

A digital file

A table

Correct

A spreadsheet

Correct

6.

Question 6

Fill in the blank: A Boolean data type can have _____ possible values.

1 / 1 point

infinite

10

two

three

Correct

7.

Question 7

The following is a selection from a spreadsheet:

Name	Age	Occupation
Agnes Shipton	44	Entrepreneur
Ronaldo Vincent	23	Accountant
Henry Sing	36	Editor
Krishna Bowling	62	Graphic designer

What kind of data format does it contain?

0 / 1 point

Tall

Narrow

Wide

Short

Incorrect

8.

Question 8

What is the term for changing the structure or format of data?

1 / 1 point

Data manipulation

Data recording

Data security

Data transformation

Correct