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3. Differentiate between mean, median, and mode.
Ans.
Mean Median Mode
Represents the average value Represents the middle value of Represents the most common value.
of a dataset. the dataset.
Useful in a normal distribution. Useful when dataset is skewed. Dataset may have more than one mode.
4. Explain categorical data with an example.
Ans. Categorical data is a data type with two or more categories. For example, a restaurant serving pizzas may group
your orders on the type of pizza you order—chicken, onion capsicum, pepperoni, etc. In this case, the type of pizza
ordered is the categorical data.
C. Competency-based/Application-based questions:
Lalita works in a mall. She wants to conduct a poll to know about customer experience. She creates a feedback form.
Which level of measurement should Lalita use? Define her attributes also.
Ans. Lalita should use Ordinal level of measurement. Her attributes can be:
1-not satisfied, 2-somewhat satisfied, 3-completely satisfied
Unsolved Questions
SECTION A (Objective Type Questions)
uiz
A. Tick ( ) the correct option.
1. data is a data type with two or more categories.
a. String b. Date and Time
c. Categorical d. Numeric
2. is a pictorial display of data that changes constantly over time. It is especially used to show trends.
a. Bar Chart b. Line Graph
c. Pie Chart d. Histogram
3. graphs are used to inspect the relationship between two variables.
a. Bar Chart b. Line Graph
c. Pie Chart d. Scatterplot
4. techniques include both manual analysis and automated data exploration software.
a. Data exploration b. Data collection
c. Numeric Analysis d. Predictive Analysis
5. In this measurement level we use some values as a shorter ‘name’ for the attribute.
a. Ratio b. Interval
c. Nominal d. Ordinal
B. Fill in the blanks.
1. is the middle value in a given list of numbers arranged in ascending or descending order.
2. A is a characteristic that is measured and can have multiple values. In other words, something that
varies from case to case.
268 Touchpad Artificial Intelligence (Ver. 2.0)-XI

