6. The heights of 200 students are recorded in the following table. Height (h) in cm Frequency 140 < 150 2 h ≤ 150 < 160 28 h ≤ 160 < 170 63 h ≤ 170 < 180 74 h ≤ 180 < 190 20 h ≤ 190 < 200 11 h ≤ 200 < 210 2 h ≤ (a) Write down the modal group. (b) Calculate an estimate of the mean and standard deviation of the heights.
6. The heights of 200 students are recorded in the following table. Height (h) in cm Frequency 140 ≤ h < 150 2 150 ≤ h < 160 28 160 ≤ h < 170 63 170 ≤ h < 180 74 180 ≤ h < 190 20 190 ≤ h < 200 11 200 ≤ h < 210 2 (a) Write down the modal group. (b) Calculate an estimate of the mean and standard deviation of the heights.
IB-Review-Estimate-mean-and-venn.docx