# BA01 Introduction to Data Analytics and R Assignment 1

 WARNING - Clicking on the "SUBMIT ASSIGNMENT" button will submit the Assignment. Be sure that you have reviewed your answers before clicking it. Subject Code: BA01 Subject Name: INTRODUCTION TO DATA ANALYTICS AND R Component name: ASSIGNMENT1

Question 1:- Function used to concatenate two strings is

a)         join ( )

b)         sub ( )

c)         contact ( )

d)         paste ( )

Question 2:- Function used to remove a variable from the memory is a)           remove ( )

b)         rm ( )

c)         erase ( )

d)         delete ( )

Question 3:- Function used to take input from the user is

a)         input ( )

b)         take ( )

c)         scan ( )

Question 4:- The following is not an operator used in logical comparisons a)           & (AND)

b)         ! (NOT)

c)         | (OR)

d)         \$ (Concat)

Question 5:- The following function is used to convert a vector into a factor a)           factor

b)         fac

c)         as.fact

d)         to.fact

Question 6:- The following function is used to merge two data frames a)           together

b)         contact

c)         join

d)         merge

Question 7:- The following function is used to filter records from the data frame based on condition

/

select                          subset

condition

chose

Question 8:- Fory=2, the command while (y<5) {print (y^3)} results into

4 9 1 6                          6 7 8                          endless loop

6 9 1 2

Question 9:- The result of the function is .na ( ) is

Logical Vector

Numeric Vector

Character Vector

String Vector

Question 10:- This function products a scatterplot between two variables with information about missing values shown in the plot`s margin:

matrixplot                          marginplot

variableplot

missingplot

Question 11:- This function can be used to read a file and create a data frame directly

input.frame ( )                          input.table ( )

Question 12:- This function reads the XML file and stores the data in the form of a list.

xmlParse ( )                          xmlRead ( )

xml. Read ( )                          xml.Parse ( )

Question 13:- Variance is calculated using the function

Varance

Var

Vary

Variance

Question 14:- Standard deviation is calculated by using function

sd ( )

Stddev ( )

dev ( )

/

 d)   stddeviation ( )                        Question 15:- The function used for picking the same sample from the dataset is a)           set ( )                        b)         set.same ( )                        c)         set.sample ( )                        d)         set.seed ( )                        Question 16:- The function that gives cumulative probability of an event is a)           pbinom ( )                        b)         dbinom ( )                        c)         rbinom ( )                        d)         qbinom ( )                        Question 17:- LeveneTest ( ) is available in the package a)         Car                        b)         Caret                        c)         normality                        d)         parametric                        Question 18:- ______________ test is a non-parametric alternative for one-sample test: a)           Kolmogorov-Smirnow                        b)         Mann-Whitney-Wilcoxon                        c)         Shapiro-Wilk                        d)         Kruskal-Wallis                        Question 19:- The non-parametric technique for comparing means is a)           t-test                        b)         ANOVA                        c)         one-sample t-test                        d)         Kruskal-Wallis                        Question 20:- Log Book System wants to achieve microsegmentation of its customer data. Which of the following techniques/technologies should it use? a)            Traditional BI tools                        b)            Merging customer transaction information with unstructured data                        c)       General statistical analysis                        d)      Only text analysis

/

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[Accessed 19/06/2021].

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