JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III Year INTRODUCTION TO ANALYTICS (ASSOCIATE ANALYTICS I) Previous Question Paper (July - 2023 - R16)
Answer all questions in Part A. In Part B, Answer any one question from each unit.
Part A
Define outlier.
Answer
An outlier is an observation point in a dataset that differs significantly from other observations. It lies at an abnormal distance from the other values in a random sample, often indicating measurement error, experimental variability, or a distinct sub-population within the data.
Discuss about conditional statements in R.
Answer
Conditional statements in R are used to perform different actions based on whether a specified condition evaluates to TRUE or FALSE. The primary structures are:
- if statement: Executes a block of code only if the condition is TRUE. Syntax: if (condition) { code to execute }.
- if-else statement: Provides an alternative block of code to execute if the condition is FALSE. Syntax: if (condition) { code1 } else { code2 }.
- ifelse() function: A vectorized function useful for operating on entire vectors. It takes three arguments: test, yes, and no. It returns a value of the same length as the input vector, making it highly efficient for data manipulation tasks in R.
State central limit theorem.
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Give the importance and properties of normal distribution.
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What is xlsx?
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Differentiate SQL and NoSQL databases.
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Define regression.
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What is Pearson Correlation?
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What is smart utility system?
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What are the applications of business intelligence?
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Part B
Describe different data types in R.
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Explain for loop in R programming and how it is useful in data frame.
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Create a matrix using rbind() and cbind() and illustrate with examples.
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Write the importance of work management and prioritization.
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Describe summery(), fix(), str(), aggregate() and name() functions.
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What is random variable? Explain its categories.
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Explain the pros and cons of team work in analytics.
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Explain Normal probability distribution function in detail.
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Explain different packages to access Excel sheet from R.
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Write the steps to connect R to NoSQL data base.
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How will you execute R code from an Excel spreadsheet?
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List and explain the classifications of NoSQL databases based on data model.
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What is OLS regression? Write the assumptions of OLS regression.
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What is ANOVA model? Explain it briefly.
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What is residual plot and explain how to find residuals.
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Give a note on Heteroscedasticity.
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Discuss the stages of engineering design process.
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Compare business analytics and organization decision-making processes.
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What is SMART? Explain in detail.
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Explain the components of Business intelligence.
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