Mathematics 0580 · IGCSE · Averages and measures of spread
Averages and measures of spread — practice question
A reaction test was taken by 100 students. The results are listed in the table.
Reaction time in seconds: 6, 7, 8, 9, 10, 11
Frequency of students: 3, 32, 19, 29, 11, 6
(a(i))[1]
State the mode.
(a(ii))[1]
Find the median.
(a(iii))[3]
Calculate the mean.
(a(iv))[2]
Find the probability that both reaction times are greater than or equal to 9 seconds.
(b(i))[1]
Find the range.
(b(ii))[1]
Find the interquartile range.
(c(i))[4]
Calculate an estimate of the mean.
(c(ii))[2]
Complete the histogram so that it displays the information in the table.
Worked solution & mark scheme
This 15-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The mode is $7$.” …