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5. How is standard deviation related to variance?
Ans. Standard deviation is the square root of the variance, and it provides a measure of how spread out the values are in
the original units (not squared units, like variance). It gives a sense of how “far” the data points are from the mean on
average.
6. What is statistical sampling?
Ans. Statistical sampling is a method used to select a smaller group (sample) from a larger group (population) to study.
Instead of analysing every individual in a dataset, researchers study the sample and generalize findings to the whole
population.
7. What is Teachable Machine?
Ans. Teachable Machine is a web-based tool developed by Google in November 2017. It allows anyone to create machine
learning models easily, without needing any coding knowledge. It is especially designed to help people train models
for tasks such as image recognition, sound classification, and pose detection, using their own data. The main idea
behind Teachable Machine is to make machine learning accessible to everyone, whether you’re a beginner or not.
8. Name any four popular no-code AI tools.
Ans. Some of the popular no-code AI tools are:
• Teachable Machine • Azure Machine Learning
• Orange Data Mining • Google Cloud AutoML
9. Differentiate between Custom Code, Low Code and No Code.
Ans. The difference between Custom Code, Low Code and No code are as follows:
Custom Code/High Code Low Code No Code
High-code development refers Low-code development involves No-code development extends the
to the conventional method of using platforms or tools that principles of low-code by enabling
software creation, where developers offer visual interfaces and users to create applications without
build applications by writing code pre-built components, the need for any coding or scripting
manually from the ground up using simplifying and accelerating knowledge.
programming languages like Java, the application development
Python, C#, and others. process.
Coders are needed to write all the Programmers are required to Coding knowledge is not necessary,
code manually. write some code manually. allowing anyone to create the product.
It is expensive. It is less expensive compared to It is less expensive compared to
high-code. Low-code.
You have the flexibility to create You can customise your product No-Code AI tools have limited
anything and customise your product only to a certain extent using customisation options, as they are
in any way you desire. code. restricted to the functions available
within the tool. However, they are
simple to use, offering drag-and-drop
features instead of requiring coding.
10. Why do we need No-Code AI? Give any four reasons.
Ans. We need No-Code AI tools because:
• When coding, we often come across different types of errors, and it can be frustrating at times.
• No-Code AI allows non-technical people—like business owners, marketers, and analysts—to create and use
AI without needing to know how to code.
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