Question
Test Scores
5
6
7
8
9
Frequency 4 2 3 5 6
( iii ) Write down the mode.
( 1 )
( iv ) Find the median score.
( 2 )
( v ) Work out the mean.
( 3 )
( b ) A student is chosen at random.
What is the probability that this student :-
( i ) scored 5 marks,
( 1 )
( ii ) scored less than 8 marks.
Answers
GPT 3.5
(i) P(scored 5 marks) = Frequency of students with score 5 / Total number of students
= 4 / (4+2+3+5+6)
= 4 / 20
= 1/5
= 0.2
(ii) P(scored less than 8 marks) = Frequency of students with scores less than 8 / Total number of students
= (4+2+3+5) / 20
= 14 / 20
= 0.7
= 4 / (4+2+3+5+6)
= 4 / 20
= 1/5
= 0.2
(ii) P(scored less than 8 marks) = Frequency of students with scores less than 8 / Total number of students
= (4+2+3+5) / 20
= 14 / 20
= 0.7