Question

Need help with this in R please!

Using your set code as in quiz 2.3, in R create data using the commands to create the vector "x":

set code = 328

set.seed(set code)

x=rnorm(50,3,1.5)

Then find

1. sample mean
2. sample median
3. sample 57th percentile (using weighted average approach)
4. create histogram of your data

Answer 1

R code:

x=rnorm(50,3,1.5)
mean(x) # sample mean
median(x)# sample median
#sample 57th percentile (using weighted average approach)
t=sort(x)
r=floor(50*57/100)
q=(50*57)/100-r
p=t[r]+q*(t[r+1]-t[r])
p# sample 57th percentile
hist(x)

Output:

> mean(x) # sample mean
[1] 2.976824
> median(x)# sample median
[1] 2.779572
> p# sample 57th percentile
[1] 3.104637

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