Many students believe that a short burst of exercise before studying improves their focus and alertness. A cognitive psychologist wanted to investigate this claim.

Fifty students from a local college volunteered to take part in the study. Each student answered the following question:

'Do you think you feel "more alert", "less alert" or "no different" when you exercise before a study session?'

The researcher obtained the results shown in Table 1.

Table 1: Responses to the question: 'Do you think you feel "more alert", "less alert" or "no different" when you exercise before a study session?'

More alert	Less alert	No different
27	11	12

What percentage of the students reported that they felt 'more alert' if they exercised before studying? Show your workings.

Many students believe that a short burst of exercise before studying improves their focus and alertness. A cognitive psychologist wanted to investigate this claim.

Fifty students from a local college volunteered to take part in the study. Each student answered the following question:

'Do you think you feel "more alert", "less alert" or "no different" when you exercise before a study session?'

The researcher obtained the results shown in Table 1.

Table 1: Responses to the question: 'Do you think you feel "more alert", "less alert" or "no different" when you exercise before a study session?'

More alert	Less alert	No different
27	11	12

What percentage of the students reported that they felt 'more alert' if they exercised before studying? Show your workings.

Data handling and analysis

Question 25

Markscheme

Data handling and analysis

Question 25

Markscheme

Data handling and analysis

Question 25

Data handling and analysis Questions

Data handling and analysis

Question 25

Data handling and analysis Questions