M1.
Working
Answer
Mark
Additional Guidance
Histogram
6
B1 Scales labelled and also marked on the vertical axis with frequency density or with cumulative frequency
OR Cumulative Frequency polygon
M1 frequency densities calculated, at least one non-trivial one correct. A1 all correctly plotted (M1 cumulative frequencies correct) M1 Use 50 on the horizontal scale of CF diagram read off vertical axis (200-210) or Use 50 on the horizontal scale of a histogram and covert area to the left to a frequency
82%
M1 convert to a percentage A1 80 – 85 Total for Question: 6 marks
M2.
Working F
4
F d or F
0. 8 4
Page 15
1 0 1
24
1
24
1. 6
Answer
Mark 4
2 0 2
6
Correct
1. 2
histogram
2
6
Additional Guidance M1 use of frequency density as two frequency ÷ width_ (can be implied by correct frequency densities or two correct bars with different width_s) or