CfE Maths Hub

Question 1

Which command imports a CSV file into R?

importing data

data = open(file)csv(data)data <- read.csv("file.csv")read.file(csv)

Question 2

Which command checks column names?

checking column names

columns dataread.names()labels(data, all)names(data)

Question 3

Write a command to find the mean of data$score.

summary statistics

Your answer

Question 4

Which phrase is best for a project conclusion?

project write-up

This proves forever...This suggests...The graph is prettyThe data is always perfect

Question 5

What does correlation not prove?

correlation

DirectionA numerical valueCausationAssociation

Question 6

For RStudio mixed revision, what should pupils do after getting RStudio output?

interpreting output

Copy every line with no commentIgnore unitsDelete the project questionInterpret the output in context

Question 7

Which command fits a linear regression model?

linear regression

read.csv(y ~ x)hist(y ~ x)lm(y ~ x, data = data)cor.only(y, x)

Question 8

Which command can produce a confidence interval for a mean?

confidence intervals

names(x)plot(x)read.csv(x)t.test(x)$conf.int

Question 9

Which option is needed for a paired t-test?

t-tests

paired = TRUEprop = TRUEpair = maybehist = TRUE

Question 10

Which command compares two proportions?

proportion tests

t.test(paired = TRUE)boxplot()prop.test()sd()

Question 11

R says object not found. What is a likely issue?

RStudio errors

The p-value is smallThe mean is too largeThe chart has a titleA misspelt or unloaded object

Question 12

What should a project limitation do?