Plot a histogram of age, Use the diet data from Q1

Plot a histogram of age

Assignment Help Advanced Statistics

Reference no: EM132249047

Assignment -

Read all questions carefully. All calculations and graphing should be done by using R (no other calculations are accepted). All graphs and tables must have the titles, all graphs should be attractive and have appropriate labels and legends where necessary.

Question 1 -

a. Read (import) the diet data in HW3 folder. [1]

Description of Diet data

Variable Name	Description	Type
SubjNo	Subject Number	Character
RBC	Red Blood Cell (in mg per liter)	Numeric
Diet	Diet Group	Character (1 = God, 2 = Fair, 3 = Poor)
Gender	Subject gender	Character (0 = male, 1 = female)
Race	Race group	Character (1 = Black, 2 = White, 3 = Hispanic, 4 = Other)
Protein	Whole-body protein turnover	Numeric
Ideal Weight	Percentage of ideal body weight for height	Numeric
Age	Patient's age in years	Numeric
HbLevel	Mean hemoglobin level in g/dl	Numeric

b. How many quantitative and qualitative variables are there in the diet data, identify them?

c. Create a descriptive summary table, this table must look similar to the table shown in the lecture - Lecture_descriptivesummaryTable.xls . You must give the title to the table.

d. Identify the possible outliers in HbLevel and RBC count? Just report the number- how many in each.

e. Calculate the CVs for HbLevel and RBC count. Which data do you think will be more consistent and why?

f. Find the quartiles of age? What is the IQR?

Question 2 -

Use the diet data from Q1 and do the followings:

a. Plot a histogram of age? Keep at least 7 intervals (bins). What is the shape of age- right or left skewed or normal?

b. Plot a pie chart of race.

c. Draw bar diagram of diet group. Also create a stacked bar diagram to show the distribution of diet group by race.

d. Make a box plot of RBC? How many outliers are there? What is the shape of RBC - right or left skewed or normal? How do you interpret this shape?

e. Create box plots of patient's age by diet group (one picture should contain all box plots).

f. Make a scatterplot between HbLevel and RBC. Do you suspect any kind of relationship between these two variables? Be specific- such as linear, quadratic etc.

Question 3 -

a. In Q1 c., we created a descriptive summary tables for pooled data. Now, create similar table for both male and female. You can follow the following format (not the exact variable names are shown). [6] Table1: .......

Variable	Male		Female
Variable	Mean or Count (%)	Standard Deviation (sd)	Mean or Count (%)	Standard Deviation (sd)
n
A
B

Attachment:- Assignment Files.rar

Reference no: EM132249047

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len2249047

3/6/2019 1:00:47 AM

Total Possible Points- 47. Create a HW3 folder in your desktop and save all works there. Read all questions carefully. Submit both R command file as Hw3_DataRepresentation, and HW3_Solution_yourlastname files separately. Each file should have your last name. All calculations and graphing should be done by using R (no other calculations are accepted). All graphs and tables must have the titles, all graphs should be attractive and have appropriate labels and legends where necessary.

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