BA01 Introduction to Data Analytics and R Assignment 1

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 ( )                       

d)         read ( )                       

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

/

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