Mean, median, mode, range and basic data tables.
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Q1 · Elementary Statistics · EASY
The marks obtained by 7 students in a test are: 45, 52, 48, 60, 55, 50, and 54. What is the mean mark?
Q2 · Elementary Statistics · MEDIUM
The ages (in years) of 9 workers in a factory are: 28, 32, 30, 28, 35, 30, 28, 40, and 33. Find the mode and median of the data.
Q3 · Elementary Statistics · MEDIUM
The following data shows the monthly electricity consumption (in units) of 11 households: 150, 180, 165, 200, 175, 190, 165, 185, 170, 195, and 180. Find the range and median of the data.
Q4 · Elementary Statistics · EASY
The mean of 5 numbers is 40. If one number is excluded, their mean becomes 35. What is the excluded number?
Q5 · Elementary Statistics · MEDIUM
The average weight of 8 persons increases by 2.5 kg when a new person replaces one of them weighing 65 kg. What is the weight of the new person?