Mean, median, mode and frequency tables.
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Q1 · Statistics · EASY
Find the mean of the following numbers: 12, 15, 18, 20, 25.
Q2 · Statistics · EASY
The marks obtained by 7 students in a test are: 45, 52, 48, 52, 60, 52, 55. Find the mode of the marks.
Q3 · Statistics · MEDIUM
Find the median of the following data: 23, 17, 30, 14, 25, 19, 22.
Q4 · Statistics · MEDIUM
The frequency distribution of ages of 40 people is given below: Age: 20-30, 30-40, 40-50, 50-60 Frequency: 8, 12, 14, 6 Find the mean age using the class-mark method.
Q5 · Statistics · HARD
The median of the following frequency distribution is 28. Find the missing frequency x. Class: 0-10, 10-20, 20-30, 30-40, 40-50 Frequency: 5, 8, x, 10, 7 Total frequency is 40.