Lecture_3_intro
Authored by Mariam Metawe3
Mathematics
Professional Development
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5 questions
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1.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
In simple linear regression (you can choose more than one answer)
There is more than one independent variable
There is only one independent variable
The dependent variable is numerical continuous
The dependent variable is numerical continuous or discrete
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which sentence explain the relation between X and y
There is a linear relation between x and y
There is no relation between x and y
There is a non linear relation between x and y
Negative values of X makes the relation with y not linear
3.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Which statement is true about this linear equation
mpg= W + drat * Z
The intercept has negative value
The slope has negative value
W has negative value
Z has negative value
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
ranges=c("2-7", "12-15")
If you want to separate minimum values of each range from the maximum values and keep this values after remove the [ - ] separator
str_split(ranges,"-")
str_subset(ranges,"-")
str_split(ranges," - ")
str_subset(ranges," - ")
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
what is the output of the follwoing code
vector=c("Tom", "Jerry", "Mickey)
str_length(vector)
3
[3,5,6]
[1,2,3]
1
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