Hierdie is ‘n ekstra teksboks. Jy mag SLEGS hierdie teksboks gebruik as ‘n vorige vraag se teksboks ontbreek het of nie behoorlik gefunksioneer het nie. As jy besluit om hierdie teksboks te gebruik, moet jy jou antwoord duidelik nommer volgens die ooreenstemmende vraag.

1.4  Helder kalkwater word in die ondersoek gebruik. Wat is die rol van die helder kalkwater? (2) 

b. ADP (2)

1.3  Verduidelik waarom die proefbuise op ‘n warm plek gelaat moet word? Dink aan ensiem aktiwiteit terwyl jy die vraag beantwoord. (4) 

A confusion matrix like the one below is effective for measuring classification performance.  Consider a ranking exercise where predictions are listed from high to low where the highest score is the most likely match and the lowest is least likely to be a match. The goal is to graph the precision (dependent variable) against the fraction of the total amount of relevant instances that were actually retrieved (independent variable).  Which is the best equation for computing the precision. 

For each of the following descriptions assign the most applicable model (a) or (b) or both (a) and (b)  if both apply.                               (a)                                                   (b)

Learn if input is a car or truck from the training data.

Source A Source B In the Great Depression in which I grew up and remember vividly, unemployment was over 25 percent and over 35 percent where I lived. A grown man would work all day, 16 hours, for a dollar. I remember hundreds of people walking by, people who had come down from the North just to get warm. They would come to our house as beggars even though they might have a college education. People didn’t have money. They bartered; they’d trade eggs or pigs. It was just completely different. Jimmy Carter Taken from an interview in 2009. Jimmy was 85 years old. 1. Study the sources below and answer the questions that follow Study Sources A and B. How far does Source A support Source B about the difficulties faced during the Great Depression? Explain your answer. (4)

2.1 Identify similarities in Source C and D. (2)

Study Source E 3 Discuss the purpose of Source E (3)