Question 4

4.1 The following table illustrates the weather forecast for George from
Wednesday, 14 January 2015 to Tuesday, 20 January 2015. Study the
weather forecast and answer the questions that follow.

4.1.1 Calculate the mean day temperature for George for the forecasted
period. Round your final answer to the nearest temperature in °C. (4)

4.1.2 Determine the range for the period. (2)

4.1.3 Calculate the median for the night temperatures. (2)

4.1.4 Briefly explain the trend of the night temperatures. (2)

4.1.5 On which day was the difference in temperature the smallest? Write
down this difference. (2)

4.1.6 Write down the day where the day and night temperatures showed
a decreasing trend. (2)

4.1.7 Use the information in the table to draw a compound bar graph in
ANNEXURE C. (6)

4.2 Explain what is meant by the forecast for Friday that states “30% chance of
rain shower”. (2)

4.3
4.3.1 You want to travel from George to Knysna.
The distance between George and Knysna is 64,7 km. Show with
the necessary calculations how long it will take you from George to
Knysna if you are driving at a speed of 90 km per hour. Give you
answer to the nearest minute.

You may use the formula:
Distance = Speed x Time (3)

4.3.2 If you experience problems with your car on the route, will it be
possible that you will complete the trip in the time that you have
calculated in QUESTION 4.3.1. (2)

[27]
TOTAL: 100