Added example file of the learnwise import format

diff --git a/mod/quiz/format/learnwise/learnwise-example.xml b/mod/quiz/format/learnwise/learnwise-example.xml
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+<?xml version="1.0" ?>\r
+<activityset setno="2">\r
+       <title>Maths</title>\r
+       <questions>\r
+               <question type="multiChoice">\r
+                       <text>The ages, in years, of 10 horses in a field were 3,  3,  4,  5,  7,  7,  7,  8,  8,  8,&lt;p&gt;\r
+Which one of the following is true?</text>\r
+                       <award>1</award>\r
+                       <hint>mean = (3+3+4+5+7+7+7+8+8+8)/10 = 6&lt;p&gt;\r
+median = 7 i.e the middle number&lt;p&gt;\r
+range = 8-3 = 5</hint>\r
+                       <answer>\r
+                               <option correct="yes">median &gt; mean &gt; range</option>\r
+                               <option correct="no">mean = median</option>\r
+                               <option correct="no">mean &gt; median &gt; range</option>\r
+                               <option correct="no">median &gt; range &gt; mean</option>\r
+                       </answer>\r
+               </question>\r
+               <question type="multiChoice">\r
+                       <text>At a college, students are given a points score calculated from their GCSE grades.&lt;p&gt;\r
+Someone with 4 A grades and 4 B grades gains a score of 36 points.&lt;br&gt;Someone with 2 A grades and 4 B grades gains a score of 26 points.&lt;br&gt;Someone with 3 A grades and 3 B grades would have a score of</text>\r
+                       <award>1</award>\r
+                       <hint>4A + 4B = 36 and 2A + 4B = 26&lt;p&gt;solving simultaneously gives A = 5 and B = 4</hint>\r
+                       <answer>\r
+                               <option correct="yes">27 points</option>\r
+                               <option correct="no">21 points</option>\r
+                               <option correct="no">30 points</option>\r
+                               <option correct="no">31 points</option>\r
+                       </answer>\r
+               </question>\r
+               <question type="multiChoice">\r
+                       <text>A sequence consists of adding the previous three terms together to form the next term. The first three terms of the sequence are 1, 2, 3.&lt;p&gt;\r
+What is the sixth term in the sequence?</text>\r
+                       <award>1</award>\r
+                       <hint>1, 2, 3, 6, 11, ...</hint>\r
+                       <answer>\r
+                               <option correct="yes">20</option>\r
+                               <option correct="no">6</option>\r
+                               <option correct="no">11</option>\r
+                               <option correct="no">13</option>\r
+                       </answer>\r
+               </question>\r
+               <question type="multiChoice">\r
+                       <text>The value of an item is described as decreasing exponentially. Which description below best matches this statement?</text>\r
+                       <award>1</award>\r
+                       <hint>No hint - you either know this or you don't!</hint>\r
+                       <answer>\r
+                               <option correct="yes">The value falls by a smaller amount each year.</option>\r
+                               <option correct="no">The value falls by the same amount each year.</option>\r
+                               <option correct="no">The value falls by the same amount each year for a while, and then remains constant.</option>\r
+                               <option correct="no">The value falls by a larger amount each year.</option>\r
+                       </answer>\r
+               </question>\r
+               <question type="multiChoice">\r
+                       <text>Consider the statement&lt;p&gt;\r
+&quot;Schools with high numbers of pupils on free school meals do not do well in league tables.&quot;&lt;p&gt;\r
+Which of the following statements follows logically from the one above?</text>\r
+                       <award>1</award>\r
+                       <hint>Factors other than the number of pupils on free school meals affect how well a school does in league tables.</hint>\r
+                       <answer>\r
+                               <option correct="yes">Schools which do well in league tables do not have high numbers of pupils on free school meals.</option>\r
+                               <option correct="no">Schools with low numbers of pupils on free school meals do well in league tables.</option>\r
+                               <option correct="no">Making all pupils pay for school meals will improve league table results.</option>\r
+                               <option correct="no">Schools which do not do well in league tables have high numbers of pupils on free school meals.</option>\r
+                       </answer>\r
+               </question>\r
+               <question type="multiChoice">\r
+                       <text>The force between two point electric charges is inversely proportional to the square of their distance apart. What effect does doubling this distance have on the force?</text>\r
+                       <award>1</award>\r
+                       <hint>Inversely proportional means that increasing the distance decreases the force.&lt;br&gt;2 squared gives 4.</hint>\r
+                       <answer>\r
+                               <option correct="yes">The force decreases by a factor of four.</option>\r
+                               <option correct="no">The force is halved.</option>\r
+                               <option correct="no">The force is doubled.</option>\r
+                               <option correct="no">The force increases by a factor of four.</option>\r
+                       </answer>\r
+               </question>\r
+               <question type="multiChoice">\r
+                       <text>Two of the five playing cards that Colin has are aces. He shuffles the five cards, then puts them face down on the table. Madge takes a card and then another. The probability that she now has &lt;b&gt;both&lt;/b&gt; of the aces is</text>\r
+                       <award>1</award>\r
+                       <hint>2/5 x 1/4</hint>\r
+                       <answer>\r
+                               <option correct="yes">1/10</option>\r
+                               <option correct="no">4/25</option>\r
+                               <option correct="no">1/5</option>\r
+                               <option correct="no">2/5</option>\r
+                       </answer>\r
+               </question>\r
+               <question type="multiChoice">\r
+                       <text>A college's guidelines say that classes must have a minimum of 12 students and a maximum of 20 students. For what numbers of students studying a particular subject is it impossible to run classes without breaking the guidelines?</text>\r
+                       <award>1</award>\r
+                       <hint>between 12 and 20 students - one class&lt;br&gt;\r
+between 24 and 36 students - two classes&lt;br&gt;\r
+between 36 and 40 students - two classes</hint>\r
+                       <answer>\r
+                               <option correct="yes">between 20 and 24 students</option>\r
+                               <option correct="no">between 12 and 20 students</option>\r
+                               <option correct="no">between 24 and 36 students</option>\r
+                               <option correct="no">between 36 and 40 students</option>\r
+                       </answer>\r
+               </question>\r
+               <question type="multiChoice">\r
+                       <text>The ages of two friends are in the ratio 3:4. In 8 years time their ages will be in the ratio 5:6. How old are they now?</text>\r
+                       <award>1</award>\r
+                       <hint>(12+8):(16+8) = 20:24 = 5:6</hint>\r
+                       <answer>\r
+                               <option correct="yes">12, 16</option>\r
+                               <option correct="no">3, 4</option>\r
+                               <option correct="no">6, 8</option>\r
+                               <option correct="no">9, 12</option>\r
+                       </answer>\r
+               </question>\r
+               <question type="multiChoice">\r
+                       <text>A heavy construction vehicle travels for 40 minutes between sites, at an average speed of 16 km per second. The distance between sites is</text>\r
+                       <award>1</award>\r
+                       <hint>16/60 x 40</hint>\r
+                       <answer>\r
+                               <option correct="yes">10.7 km</option>\r
+                               <option correct="no">2.5 km</option>\r
+                               <option correct="no">6.4 km</option>\r
+                               <option correct="no">38.4 km</option>\r
+                       </answer>\r
+               </question>\r
+       </questions>\r
+</activityset>\r