Pre-Evaluation Test

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Pre-Evaluation Test

Pre-Evaluation Test on R for Exploratory Data Analysis

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Full Name *

Designation *

Organization *

1. What is R? *

1 point

A language and environment

A tools for statistical computing and graphics

R is a language and environment for statistical computing and graphics

2. Which one you can use to produce co-relations ? *

1 point

cor ()

corr()

correlation()

3. Which one is the data structures in R that is used to perform statistical analyses and create graphs? *

1 point

Matrices

Data frames

All of the above

4. In R how missing values are represented ? *

1 point

NAN

Null Value

5. Why loglm() function is used in R? *

1 point

Finding log value

Creating linear model

To create log-linear models

6. Statistics is a scientific field which deals with *

1 point

Collecting and analysis of data only

Collecting, analysis and interpretation of data

Population and sample only

7. Which of the following statement is true for R. *

1 point

R is a computing software confined with statistical packages

R can integrate with other languages like C and C++

R is a programing language software that deals statistical and other packages and integrate with other languages like C, C++, Python etc.

8. Which of the following types of files can be inputted in R. *

1 point

Excel, SPSS, CSV, Stata etc.

Excel and SPSS only

Excel and CSV only

9. Which data types and structure R can consider *

1 point

Data frame and Matrix only

Vector, Data frame, Matrix, Array, Factor, List

Vector, Data frame, Matrix only

10. Normality of data can be checked by *

1 point

QQ plot and Shapiro-Wilk normality test

Histogram and observing the value of lamda of Boxcox power transformation curve

both of the above

11. Experimental design is conducted for *

1 point

collecting appropriate data

analyzing data

interpreting data

12. Which of the following function is used for computing ANOVA table in R. *

1 point

aov

13. Which of the following R package is used for multiple comparison of treatment means or post-hoc test *

1 point

forecast

rhcoclust

agricolae

14. Which function in R is used to display the first few rows of a data frame say x. *

1 point

summary(x)

head(x)

apply(x)

15. Which function in R is used to get mean of a variable say y. *

1 point

mean(y)

sd(y)

sqrt(y)

16. The components of list in R may be *

1 point

vector and matrix

factor and data frame

both of the above

17. Which R function is used to make co-cluster between row and column entity of a data matrix simultaneously? *

1 point

rhcoclust

prcomp

hclust

18. Which R function is used to make cluster either row or column entity and co-cluster between row and column entity simultaneously of a data matrix? *

1 point

rhcoclust

prcomp

hclust

19. A list in R can contains *

1 point

Only vector and matrix

Only data frame and factor

Vector, data frame, matrix, factor etc.

20. We reject the null hypothesis when *

1 point

P-value is less than the level of significance

P-value is greater than the level of significance

P-value is equal to level of significance

21. Which of the following statement is true for the biplot of principle component analysis *

1 point

Only shows the important samples

Describe the high dimensional data by first two principle component

Only shows the important features

22. Which of the following statement is true for bioinformatics *

1 point

Bioinformatics deals with exploring information from agricultural data with the help of statistics and computer science

Bioinformatics deals with exploring information from biological data with the help of statistics and computer science

Bioinformatics deals with exploring information from molecular data with the help of statistics and computer science

23. Which function is used to import data in R *

1 point

make.names

read.csv

write.csv

24. Standard deviation measures *

1 point

the variability in the data

how scatter the dataset is

both of the above

25. The name of the R programming language software named after *

1 point

the first names of R programming language authors

it has been taken from alphabets of English language

the first name of a scientist

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