Regularly playing computer games may improve problem-solving skills. The table below shows the time a sample of gamers took to complete a problem-solving task (in seconds). A lower score indicates...

Regularly playing computer games may improve problem-solving skills. The table below shows the time a sample of gamers took to complete a problem-solving task (in seconds). A lower score indicates better problem-solving skills. Their scores are given below:

a) Decide on a suitable interval range and create a frequency and cumulative frequency table of the scores.

b) Use the frequency table to construct a histogram. i) What is the general shape of the distribution? Is this what you would expect? ii) Are there any unexpected observations? If so, what might account for these observations?

c) Construct a cumulative percentage frequency chart of the data. i) What reaction time does half of the sample fall under? Use the graph to estimate an answer. ii) What reaction time does 80% of the sample fall under?