Maths Level 4 Module 11

Mathematics NQF Level 4 *see terms and conditions Downloaded from hlayiso.com Mathematics NQF Level 4

Data handling and probability models Topic 4 Downloaded from hlayiso.com Mathematics NQF Level 4

Represent, analyse and interpret data using various techniques Module 11 Downloaded from hlayiso.com Mathematics NQF Level 4

Summative assessment Module 11 Downloaded from hlayiso.com Mathematics NQF Level 4

2. Give examples of: a) Qualitative variables Male/female; eye colour (blue or brown) b) Quantitative variables The IQ of students; size of families c) Discrete variables 1; 3; 5; 10 d) Continuous variables 1,21; 16,45 Downloaded from hlayiso.com Summative assessment – Module 11

3. What type of data results from rolling a dice? Discrete 4. What type of data is collected when a person is weighed? Continuous Downloaded from hlayiso.com Summative assessment – Module 11

5. What factors must be considered when deciding on a sample size? • The bigger the sample the more accurate the results will be. • The bigger the population, the smaller the sample may be. • Quantitative research needs bigger samples. • Qualitative research needs smaller samples. Downloaded from hlayiso.com Summative assessment – Module 11

5. What factors must be considered when deciding on a sample size? (Continued) • At least 30 items are needed when statistical techniques are going to be used. • Heterogeneous populations need bigger samples. • If you expect small differences, you need a big sample size. Downloaded from hlayiso.com Summative assessment – Module 11

5. What factors must be considered when deciding on a sample size? (Continued) • At least 30 items are needed when statistical techniques are going to be used. • Heterogeneous populations need bigger samples. • If you expect small differences, you need a big sample size. Downloaded from hlayiso.com Summative assessment – Module 11

6. The ogive in Figure 11.12 was drawn from data obtained from the marks students scored in a test. Downloaded from Figure 11.12 hlayiso.com Summative assessment – Module 11

6a. How many students were in the class? 27 6b. How many students got less than 20%? 2 6c. How many students got more than 40%? 18 Downloaded from hlayiso.com Summative assessment – Module 11

7. The box-and-whisker diagram in Figure 11.13 was drawn to show a class’s test marks. From the diagram determine: 7a. The mean 45% 7b. The lowest mark obtained 10% Figure 11.13 Downloaded from hlayiso.com Summative assessment – Module 11

7c. How many students got between 10% and 30% if there were 32 students in the class? 25% of 32 got between 10% and 30% 25 = × 32 100 =8 Downloaded from hlayiso.com Summative assessment – Module 11

Mathematics NQF Level 2 Downloaded from hlayiso.com Mathematics NQF Level 4