The table shows the scores of 10 students in a Mathematics test.

1. (a)

   Write down the values of w, x, y and z.

   Answer w = ___

   x = ___

   y = ___

   z = ___

2. (b)

   The temperature at Ang Mo Kio was recorded every day for 60 days.
   The cumulative frequency graph below shows the distribution of the temperatures.

   
   1. (i)

      Use the graph to estimate

      1. (a)

         the number of days that had temperatures above 29°C.

         Answer ___

      2. (b)

         the interquartile range of the temperatures.

         Answer ___

   2. (ii)

      The temperature at Jurong was recorded every day for the same period.
      The interquartile range of the temperatures at Jurong is 1.5°C.
      Explain what this tells us about the temperature at Jurong compared with the temperature at Ang Mo Kio.