# JNTU Kakinada B-Tech 2-1 R1621051 STATISTICS WITH R PROGRAMMING R16 May 2018 Question Paper

Code No: R1621051
II B. Tech I Semester Supplementary Examinations, May – 2018
STATISTICS WITH R PROGRAMMING (Com to CSE & IT)Time: 3 hours Max. Marks: 70
Note: 1. Question Paper consists of two parts (Part-A and Part-B) 2. Answer ALL the question in Part-A
3. Answer any FOUR Questions from Part-B
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
PART ?A
1. a)What is variable scope? (2M)
b)Explain about quote( ) function. (2M)
c)Distinguish between max( ) and pmax( ) functions. (2M)
d)Explain about R graphics devices. (3M)
e)Explain normal distribution. (3M)
f)Define random forest. (2M)
PART ?B
2. a)Explain in detail about vectors in R. (7M)
b) Discuss about matrices in R. (7M)
3. a)Describe quick sort implementation using recursion. (7M)
b) Justify the following: ?R functions are first-class objects?. (7M)
4. a) Write R code for the following:
Three committees, of sizes 3, 4 and 5, are chosen from 20 people. What is the
probability that persons A and B are chosen for the same committee? (10M)
b) What are the uses of scan( ) function? Explain with examples. (7M)
5. a)Discuss about plot( ) and abline( ) functions with examples. (7M)
b) Explain about two density estimates on the same graph. (7M)
b) Explain in detail about Poisson distribution. (7M)
7. Explain the following:
a) Survival analysis
b) Poisson regression (7+7M)

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