CODE: AQDMos TOTAL MARKS: 130 DUE DATE: 20 AUGUST 2020(20/08/20) LECTURER: DR S E AKPO QUESTION ONE 1. Define and explain citing examples the following terms 1.1. Census 1.2. Variable 1.3. Data 1.4. Population 1.5. Sample 1.6. Sampling 1.7. Parameter 1.8. Statistic 1.9. Interview 1.10. Probability Question Two 2. Differentiate the following 2.1. Primary and secondary data 2.2. Internal and external data 2.3. Discrete and continuous variables (30marks) l3] l3] l3] [3] [3] [3] l3] [3] [3] [3] (20marks) [4] [4] l4] \"7%,. I' 5% backspace num lock R Y U O P 9 pg up F 6 3 2.4 . Qualitative and quantitative data pg dn 2.5. [4] Finite and infinite population [4] del Question Three (10Marks) 3. Complete the following sentences 3.1 . Probability values lies between... I and o [2] 3.2. Correlation values lies between... -1 + 1 [2] 3.3. The probability on an impossible event is equal to... [2] 3.4. The probability of a certain event is equal to... 1 [2] 3.5 A numerical characteristic obtained from a sample is called.. Stateshe [21 [Total 10 Marks] QUESTION Four (30 marks) 4.1. What is statistics as study all about? Explain in details [2] 4.2. Mention the two branches of statistics and explain what each entails [4] 4.3. Mention and explain the fours scales of measurement [8] 4.4. Mentions the three methods of data collection and explain each [6] 4.5. Tabulate the main features two sampling techniques [6] 4.6. Give two examples of each technique mentioned above [4] QUESTION Five (20 marks) . 9. Table 5 Cross-tabulation table - NSX Companies by sector and size Sector Company size Row total It In ranks Small A Medium Large Mining 3 8 30 41 Financial 9 21 42 72 10 6 8 24 Service B 14 6 33 Retail 13 48 86 170 analyses Column total 36 multi van 2W . . . hat is the probability that a randomly selected NSX company will be small and operate in the service sector? either a small company ora service sector company, orboth? [5 marks] 5.3. What is the probability of a randomly selected NSX company being both small and a mediumsized company? . 7 . [5 marks] 5.4. What is the probability of selecting a small, medium or large NSX company from the sample of 170 companies surveyed? [5 marks] [Total marks 20] QUESTION Six (20marks) Table 6 Numeric frequency distribution for courier delivery times (minutes) T- \\ '1 .' j 1\"" l ime 1 Frequency 1 DC .. '_ (, 1 _ 1 g r O ,