S3 GEL 3.3 Revision

A student collected data from his classmates on the amount of time they spent on their mobile devices daily.

 

How can the student calculate the mean amount of time spent on their mobile devices?

• Arrange the data in sequence with the smallest value first.  The mean value is the middle value.

• The mean is the most frequent value in the data set.

• The mean is the sum of all the values in the data set divided by the number of values in the data set.

A student wanted to know which mobile service provider (A, B or C) is the most popular amongst his classmates. Which measure of central tendency should he use when collecting data?

• Mean

• Median

• Mode

“Colours used in mental maps can differentiate places and convey emotions. For example, when red is used on a mental map, it always indicates anger.” True or false?

• True

• False

Answer explanation

Mental maps reflect subjective experiences. Different colours used may indicate different emotions to individuals.

What are some possible explanations for when a mapper included blank spaces in his map?

• Blank spaces on maps could mean that the mapper is unfamiliar with the area.

• Blank spaces on maps could mean that the mapper has not engaged in any activities there before.

• Blank spaces on maps could mean that the mapper is very familiar with the area.

• Blank spaces on maps could mean that the mapper does not find the area important.

Study Figure which shows the number of visitors to the beach and the corresponding average daily temperature.

Which of the following best describes the correlation?

• Negative correlation 

• No Correlation

• Positive Correlation

Answer explanation

• The graph shows a positive correlation whereby the higher the average daily temperature, the higher the number of visitors to the beach.

Study Figure which shows a mental map drawn by a student.

 

Which of the following statements is true?

• 
  The landmarks on the mental map show a cluster of the mapper’s favourite places on the campus.

• The landmarks on the mental map show a repetition of the mapper’s favourite places on the campus.

Answer explanation

• Clusters show information arranged close together in a group.

• Repetitions are symbols used by a mapper repeatedly on the map to indicate favourite places or important places.