statistic data assignment

PUBHLTH 223 Data Assignment 1 Instructions  Use the CORE DATA FOR 3 DATA ASSIGNMENTS dataset (MSExcel format) found in the Class Information section on Moodle to answer the following questions. Refer to the corresponding data dictionary for information about the data.  These questions may be answered using R, Excel, Statkey or any other software package.  You need to submit your output (including any R code), along with the results (i.e. tables, figures).  After completing the assignment, upload your answers as a PDF file . The file should be saved as Last name First name_da1 (e.g. Josh Freeman should submit his PDF file as ("Freeman Josh _da1.pdf").  Refer to the syllabus for due date. Submissions will be accepted for a grace period of two add itional days but the grades will be reduced by 20%. Research Question 1. How many observational units (cases) are in this dataset? ( 1 point ) 2. How many variables are in this dataset? Identify which variables in the dataset are categorical and which are quantitative. ( 2 points ) 3. For BMI a. describe numerically the center and spread. ( 4 points ) b. create a graphical summary to describe the se data . Make sure you give a t itle and label the axes of your graph. ( 4 points ) c. Write 2 -3 sentences describing the data and the distribution shape . (6 points) 4. Provide a frequency table for smoking status. (2 points) 5. Repeat the analysis from question 3 for each strata of smoking status. ( 4 points ) 6. Do there appear to be any differences in BMI by smoking status? Write 2 -3 sentences to summarize your findings. ( 2 points)