##Biostatistics - Basic Concepts##

#Setting up the workspace#
# go to Session - Set Working Directory - Chose Directory...- RGO5860

#Loading the data#
week1<-read.csv("week1_data.csv", sep=";", header = TRUE)

#This database contains data from 130 women with ovarian cancer. 
#There are 9 variables: id=patient id; age = age at diagnosis; preg = number of pregnancies; del = number of deliveries; misc = number of miscariages; surgery = type of surgery; stage: tumor staging; survival = patient survival in months; type = tumor type


#Exploratory data analysis##

attach(week1)

# to view the database structure use the following command:

View(week1)

#Go to the week1 quiz and answer the questions 1-4.

#Write commands to calculate the mean of patients age and the median of the number of pregnancies and answer the question 5.


#write the command to answer the quiz #6 and #7



##Graphics##

#write the command to draw a graph to verify the relationship between the number of pregnancies and the number of deliveries and answer the quiz #8.


#write a command to draw a graph to compare the age between tumor types and answer the quiz #9


#write the codes to draw graphs that allows to evaluate the distribution of frequencies of the variables age and survival and answer the quiz #10