Mathematics and Mathematical Literacy - Thutong

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Mathematical Literacy (NCS)/Grade 12/P2 76 ExemplarQUESTION 33.1 Describe in your own words what is meant by the following: “the student takingthe test scored at the 75th percentile” (2)3.2 Test results for a particular test aresummarised alongside. In whichquartile would a person with a total of88 fall?Test Scores Frequency66 - 70 471 - 75 376 - 80 281 - 85 686 - 90 391 - 95 2(2)Questions 3.3 and 3.4 on the next page refer to the graph below.BMI97 95 90 85 75BMI5025103Copyright reservedPlease turn over
Mathematical Literacy (NCS)/Grade 12/P2 77 Exemplar3.3 Body Mass Index (BMI) is a number calculated from a child’s weight andheight. BMI number is plotted on the CDC BMI-for-age growth charts (for eithergirls or boys) to obtain a percentile ranking. BMI-for-age weight statuscategories and the corresponding percentiles are shown in the following table.Weight Status Category Percentile RangeUnderweightHealthy weightAt risk of overweightOverweightLess that the 5 percentileth5 th percentile to less than the 85 th percentileth85 to less that the 95 th percentileEqual to or greater that the 95 percentile3.3.1 At what percentile would an 8 year old boy with a BMI of 17 be? (2)3.3.2 What is the BMI of a 5 year old boy if his BMI places him at the 90 thpercentile? (2)3.3.3 Within what range can a 10 year old boy’s BMI be if his weight is to beconsidered “healthy”? (4)th3.4weight (kg)BMI is calculated using the formula BMI =( height (m)) 23.4.1 What is the weight status of an 8 year old boy who is 120cm tall andwho weighs 30kg? (5)3.4.2 How heavy would a 16 year old boy be if he is 1,65m tall and his BMI isat the 50 th percentile? (5)[22]Copyright reservedPlease turn over
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Mathematics and Mathematical Literacy - Thutong

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