# which of the following function is used to view the dataset in spreadsheet like format?

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## Which of the following is used to view dataset in a spreadsheet

Which of the following is used to view dataset in a spreadsheet-type format ? (a) Disp() (b) View() (c) Seq() (d) lm()

## Which of the following is used to view dataset in a spreadsheet-type format ?

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## DATA SCIENCE WITH R

1.

Which function is used to view the dataset in spreadsheet like format?

view() function show the dataset in the spreadsheet format.

Add Bookmark 2.

How to fine-tune random forest model?

3.

Which R package is used for market basket analysis?

4.

How you can produce correlations and covariance in R?

5.

How to interpret Gini index in R?

6.

How do you interpret when R^2= 0.7?

7.

rnorm(10) will generate 10 random numbers that will follow a normal distribution. If the mean and standard deviation is not specified to the norm() function then,

8.

pnorm(1.96, 0,1) will give

9.

Generalized Linear Models (GLM) are an extension of Linear Regression Models that allow the dependent variable to be non-normal. Is the statement correct?

10.

glm() in R used to fit generalized linear models. To fit a logistic regression model with a dichotomous dependent variable, which of the parameter to the glm() function is correct?

11.

What is the command to install ggplot2 package in r?

12.

When you build a linear regression model using the lm() function and run a summary of the linear model with a command like summary(model), you get the output as follows. How is the t-value calculated?

13.

Say the dependent variable, y, expenses in dollars. From the below output, what can we say about the residuals?

14.

Using which Statistical test, you can test if a data is normally distributed?

15.

How do you test for Multicollinearity in datasets in R?

16.

What does Variance Inflation Factor (VIF) detect?

17.

How to interpret Shapiro Wilk normality test?

18.

Explain correlation is not causation.

19.

Can there be a no intercept model? Is there any interpretation of R square in a no intercept model?

20.

How to detect heteroscedasticity and rectify it?

21.

How do you determine number of cluster in K-means using R

22.

How do you scale or normalize variables in R?

23.

Mention the functions to add straight lines to the graph using ggplot2 package in R.

24.

How would you do dummy coding in R?

25.

How do you interpret the model summary of the below logistic regression model?

26.

How do you interpret the pseudo-R square of logistic regression?

27.

How to interpret the ROC curve?

28.

The following scree plot suggests that just one component may be sufficient to summarize the data.

29.

Why Hosmer Lemeshow test is used?

30.

Explain the output of confusion matrix.

31.

How will you list all the datasets available in all R packages?

32.

R programming language has several packages for data science which are meant to solve a specific problem, how do you decide which one to use?

33.

Sample (0, 1, 0, 0, 1, 0) is drawn from binomial distribution. What is the maximum log likelihood function of the μ? How do you solve in R?

34.

Which of the function in R is used to check where the mean of the two groups is equal to each or not?

35.

How to find concordant and discordant pairs in R?

36.

What is the difference between rpart and party package for developing a decision tree model?

37.

How do you boost your decision tree in order to improve the results?

38.

How do you train the data for K-means clustering?

39.

How do you select components(variables) in PCA using R?

40.

What is the difference between PCA and Factor Analysis? How do you interpret them in R?

41.

What is ANOVA and how do you implement in R?

42.

How do you interpret the output of ANOVA?

43.

How do you do market basket analysis using R?

44.

How do you map out the rules in a graph in market basket analysis?

45.

How do you find information gain in R?

46.

The iris dataset has different species of flowers such as Setosa, Versicolor and Virginica with their sepal length. Now, we want to understand the distribution of sepal length across all the species of flowers. What is the method to visualize this relation?

## Data Visualization

This set of R Programming Language Multiple Choice Questions & Answers (MCQs) focuses on “Visualizing Data – 1”. 1. Which of the following method make vector of repeated values? a) rep() b) data() c) view() d) read() 2. Which of the following finds the position of a quantile in a dataset? a) quantile() b) barplot() ... Read more

## R Programming Questions and Answers – Visualizing Data – 1

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This set of R Programming Language Multiple Choice Questions & Answers (MCQs) focuses on “Visualizing Data – 1”.

1. Which of the following method make vector of repeated values?

a) rep() b) data() c) view() d) read() View Answer

2. Which of the following finds the position of a quantile in a dataset?

a) quantile() b) barplot() c) barchart() d) rep() View Answer

3. Which of the following function cross-tabulate tables using formulas?

a) table b) stem c) xtabs d) read View Answer

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4. Which of the following groups find the correlation matrix?

a) factor.model b) col.max(x) c) stem d) which.max(x) View Answer

5. which of the following statement make a mosaic plot?

a) histogram() b) mosaicplot() c) bar() d) which.max(x) View Answer

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Start the Test Now: Chapter 1, 2, 3, 4, 5, 6, 7, 8, 9, 10

6. Which of the following compute proportions from a contingency table?

a) par() b) prop.table() c) anova() d) mosaicplot() View Answer

7. Which of the following is lattice command for producing a scatterplot?

a) plot() b) lm() c) xyplot() d) anova() View Answer advertisement

8. Which of the following builds empirical cumulative distribution function?

a) ecdf() b) cum c) cumsum d) lm() View Answer

9. Which of the following is used to view dataset in a spreadsheet-type format ?

a) Disp() b) View() c) Seq() d) lm() View Answer advertisement

10. ________ function carries out a chi-square test.

a) chisq.test() b) t.test() c) prop.test() d) fisher.test() View Answer

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Guys, does anyone know the answer?