The "mammals" data set in the "MASS" library contains the result of a study of sleep in mammal species. 1 2 Load the "mammals" d
ata set into your R workspace. In Rstudio you can click on the "Packages" tab and then on the checkbox next to MASS. Without Rstudio, type >data(mammals.package-"MASS") Attach the mammals data frame to your R search path with > attach mammals) A random experiment is to choose one of the species listed in this data set. All outcomes are equally likely. You can obtain a list of the species in the event "body > 200" with the command > subset (mammals,body>200) What is the probability of this event, i.e., what is the probability that you randomly select a species with a body weight greater than 200 kg? You can obtain a count of the species with body weights greater than 200 kg, by >sum(body > 200)
1 answer:
Complete Question:
The complete question is shown on the first uploaded image
Answer:
The probability that the random you randomly select species that are greater than 200 kg is = 7/62
Step-by-step explanation:
Step One: Load the data set in to the R work space
data(mammals,package="MASS")
attach(mammals)
Step 2 : Obtain the list of the species that are greater than 200 and store it on y variable.
y <- subset(mammals,body>200)
Step Three : Obtain the total size
nrow(mammals)
Step Four : Obtain the sum of species greater than 200
sum(body > 200)
total size = 62
size with body > 200 = 7
hence
required probability = 7/62
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