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general knowledge

Authored by Mariam Metawe3

Mathematics

Professional Development

Used 2+ times

general knowledge
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6 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

All are measures of central tendency EXCEPT

Mean

Median

Mode

Standard deviation

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Correlation takes values from 0 to 1 and can't take a negative value

True

False

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Frequency tables is used to describe categorical data

True

False

4.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

The following function (%>%) can be called when library() which package(s)

You can choose more than one answer if possible

library(dplyr)

library(tidyverse)

library(ggplot2)

library(ggplot1)

5.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Which of the following R code snippets correctly assigns the vector c(1, 2, 3) to the variable my_vector?

you can choose more than one answer if possible

my_vector <- 1, 2, 3

my_vector >- c(1, 2, 3)

my_vector <- c(1, 2, 3)

my_vector = 1:3

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the meaning of this code

salary$money

select the column Money from dataframe called salary

change the unit of column called money into dollars

select a column called salary from a dataframe called money

change the unit of column called salary into dollars

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