1. (a) What is the difference between a qualitative and quantitative variable? [5 Marks] (b) A town has 15 neighbourhoods. If you interviewed everyone living in one particular neighbourhood, would you...

Feb Drive 2011 MBA SEMESTER 1 MB0040 – STATISTICS FOR MANAGEMENT- 4 Credits (Book ID: B1129) Assignment Set- 1 (60 Marks) Note: Each question carries 10 Marks. Answer all the questions 1. (a) What is the difference between a qualitative and quantitative variable? [5 Marks] (b) A town has 15 neighbourhoods. If you interviewed everyone living in one particular neighbourhood, would you be interviewing a population or a sample from the town? Would this be a random sample? If you had a list of everyone living in the town, called a frame, and you randomly selected 100 people from all neighbourhoods, would this a random sample? [5 Marks] 2. a) Explain the steps involved in planning of a statistical survey? [5 Marks] b) What are the merits & Demerits of Direct personal observation and Indirect Oral Interview? [5 Marks] 3. a) Draw Ogives from the following data and measure the median value. Verify it by actual calculations. [5 Marks] Central size 5 15 25 35 45 Frequency 5 11 21 16 10 b) Complete the following distribution, if its Median is 2,600 and compute the value of Arithmetic Mean. [5 Marks] Size 1000-1500 1500-2000 2000-2500 2500-3000 3000-4000 4000-5000 5000-6000 Total Frequency 120 ? 400 500 ? 50 20 1500 4. a) What is the main difference between correlation analysis and regression analysis? [5 Marks] b) In a multiple regression model with 12 independent variables, what are the degrees of freedom for error? Explain? [5 Marks] 5. a) Discuss what is meant by Quality control and quality improvement. [5 Marks] b) What are the limitations of a quality control charts? [5 Marks] Feb Drive 2011