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

# CDC data set


#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%?

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