The data below shows the sample of number of hours spent studying in the past week for 28 students. The measurement is to the nearest hour. a) hours Frequency 10 – 19 20 – 29 4 30 – 39 8 40 – 49 10 50...

Extracted text: The data below shows the sample of number of hours spent studying in the past week for 28 students. The measurement is to the nearest hour. a) hours Frequency 10 – 19 20 – 29 4 30 – 39 8 40 – 49 10 50 – 59 4 Er-m = 1066. f -m² = 44027 i) Estimate the sample mean, median, mode and standard deviation of the number of hours spent studying in the past week.