Post-Evaluation Test

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Post-Evaluation Test on R for Exploratory Data Analysis

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0 points

1. What is the prerequisite to do exploratory data analysis with R? *

1 point

library(tidyverse)

knitr

None of the above

2. Which is the correct format to import data for analysis? *

1 point

heights <<- read_csv("data/heights.csv")

heights <- read_csv("data/heights.csv")

Both of the above

3. Before data modeling with agricultural data which packages are required? *

1 point

library(modelr)

library(agridat)

Both of the above

4. Which is a powerful tool for clearly expressing a sequence of multiple operations? *

1 point

Pipe

gimgitter

None of the above

5. Which tools/package is mostly used in R to conclude data analysis and take a management decision? *

1 point

purr

RMarkdown

All of the above

6. 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

7. Standard deviation measures *

1 point

the variability in the data

how scatter the dataset is

both of the above

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

1 point

make.names

read.csv

write.csv

9. 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

10. 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

11. 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

12. A list in R can contains *

1 point

Only vector and matrix

Only data frame and factor

Vector, data frame, matrix, factor etc.

13. 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

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

1 point

rhcoclust

prcomp

hclust

15. The components of list in R may be *

1 point

vector and matrix

factor and data frame

both of the above

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

1 point

mean(y)

sd(y)

sqrt(y)

17. 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)

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

1 point

forecast

rhcoclust

agricolae

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

1 point

aov

20. Experimental design is conducted for *

1 point

collecting appropriate data

analyzing data

interpreting data

21. 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

22. 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

23. 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

24. 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.

25. 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

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