R Intermediate Quiz

1
Which symbol should you use to place comments in R?
 

1. *
2. /
3. $
4. #

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2
Formula for Simple Linear Regression

1. y=ax+b
2. y=ax^2+bx^2
3. y=e^x
4. y=a+b1x1+b2x2

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3
In simple Linear regression number of Indepent Variables

1. 2
2. 3
3. 1
4. 0

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4
Which chart is used to compare data side by side

1. Bar
2. Line
3. Gauge
4. KPI

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5
if emp.data is Data frame then emp.data[,1:3] will return

1. All rows with first 3 columns
2. First 3 columns with all rows
3. first and 3rd columns of all rows
4. First and 3rd Rows of all columns

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6
Load data from CSV using one of the below method

1. csv
2. read.csv
3. load
4. Read

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7
The structure of the data frame can be seen by using

1. str
2. desc
3. show
4. ls

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8
Which of the following unsupervised Machine Learning Algorithm?

1. K-means Clustering
2. Simple Linear Regression
3. Multiple Linear Regression
4. Logistic Regression

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9
By default head function in R returns first

1. 5 Rows
2. 6 Rows
3. 7 Rows
4. 3 Rows

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10
Which function is used to create model in linear regression

1. glm
2. lm
3. k-means
4. clust

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11
Strong Positive correlation coefficient has value

1. close to 0
2. close to 5
3. close to 1
4. close to -1

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12
Strong Negative correlation coefficient has value

1. close to 0
2. close to 5
3. close to 1
4. close to -1

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13
Which function is used to  partition n observations into K clusters

1. glm
2. lm
3. k-means
4. clust

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14
Which function is used to create model in Logistic regression

1. glm
2. lm
3. k-means
4. clust

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15
Confusion Matrix is related to

1. Simple Linear Regression
2. Multiple Linear Regression
3. Logistic Regression
4. Clustering

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