Programming Homework Help

I’m working on a r exercise and need an explanation and answer to help me learn.

#REMEMBER THE DATA IS NAMED cdc, don’t forget to run the link first!
#Don’t forget to use $ to separate the name of the dataset and the column for some questions below ex: mean(cdc$weight) OR attach data with the code attach()

#INSTRUCTIONS
#Type the codes for each question
#Include answers to ALL questions in the script as a comment (with a #).
#Questions with a * next to it will ALSO require you to input the answer in Canvas.
#Lastly, upload this R script AND input the corresponding answers to Canvas.
#If you are missing codes or answers in this script, points will be deducted.

source(“http://www.openintro.org/stat/data/cdc.R“)

# 1 View the data

# *2 How many observations and variables are there?

# 3 Find the names of the variables

#Use summary code to view a summary of the age variable *Don’t forget to use $ if you didn’t attach data
# *4 What is the median age? What is the age of the youngest person in the data?

# *5 What is the height of the tallest and shortest person *Don’t forget to use $ if you didn’t attach data

# 6 Show the first 3 observations in the dataset

# 7 Show the last 5 observations in the dataset

# 8 Use the mean code to find the mean of the wtdesire column and save it as av_wtdesire *Don’t forget to use $ if you didn’t attach data

# *9 Run your item, av_wtdesire that you just created

# *10 Find the standard deviation of age and the variance of height

# 11 View a histogram of height

# *12 What class is genhlth

# 13 Create a table of hlthplan

# *14 What is the 3rd quantile of height and what does it mean? Hint: Use summary code

# 15 Find the first 3 observations of the weight column

###Normal Distribution###
# *16 Let’s assume the age a person buys their first house is normally distributed with a mean of 28 years old and a standard deviation of 7 years.

#a What is the probability that a person buys their first home younger than 24 years old?

#b What is the probability that a person buys their first home older than 35?

#c What is the probability that a person buys their first home between 20 and 37 years old?

#d What age is the cuttoff value corresponding to the top 20%?

#e What age is the cutoff value corresponding to the bottom 30%?