
Home Work Assignment 3for MSIS 385 section 02Last modified on 2/28/99 9:50 PM Due March 9 1999 in class 

Note: 
Make sure to put your name, student ID number and the date on the handout 



Question 1 
Do problem 10.6 on page 349. 

Question 2 
Do problem 10.10 on page 353. 

Question 3 
Do problem 10.40 part a on page 362 

Question 4 
Do problem 10.46 on page 364. 

Question 5 
Do problem 10.55 on page 367. 

Question 6 
A sample of 10 students from among Rutgers male students were chosen at random and their heights were found to be 5'9", 6'0", 5'4", 6'1", 5'11", 4'11", 5'7", 6'3", 5'10", 5'2" where 5'9" means five feet and nine inches. Assuming the heights are normally distributed, give a 90% confidence interval for the average height of Rutgers male students. 

Question 7 
Park rangers in the Yosemite national park want to estimate the total number of rain deer in the park. They pick 50 deer at random and tag their ears and then let them go. A few days later, they pick 80 rain deer at random and find out that 1/5 of them are tagged. Find an 80% confidence interval for the size of the number of rain deer in Yosemite. Comment: This problem can be solved by trying to estimate an 80% confidence interval for the proportion of tagged deer. Then, if the true proportion is, say, p, we know that p=m/N where m the number of tagged deer is known (50 in this example) and N is the total population. Thus an approximation for p yields and approximation for N. Transform the confidence interval for p to one for N. 

Question 8 
Consider the following set of data 

X 
1 
3 
4 
6 
8 
9 
11 
14 

Y 
1 
2 
4 
4 
5 
7 
8 
9 




Question 9 
An Excel project. In the file Excel world.xls located at http://rutcor.rutgers.edu/~alizadeh/CLASSES/99sprMIS385/Homeworks/world.xls some data about economic and social activities of countries of the world are presented. This data is obtained from the Web site of world bank. The data contains per capita Gross Domestic Product (GDP) of each country along with information about other social and economic activities such as percentage of child malnutrition, life expectancy for male and female and illiteracy rate for adults, both male and female. Use Excel to download this file and answer the problems below using a separate Excel worksheet for each question. Hand in the results on a floppy disk clearly labeled with your name and ID number. In addition on the label write "Homework assignment 3 question 9". Note: It is important that you download the from within Excel. If you use Netscape and save this file and then try to load in Excel it may not work properly.











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