Statistics
Types of exercises: arithmetic mean, mode, median, weighted mean, mean, median and mode from a frequency table, mean - a missing value and a combined mean.
Exercises are drawn at random from a large bank - every click gives a different set.
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Solved: 0 of 10
Compute the arithmetic mean
6, 27, 23, 19
Give the mode
11, 11, 11, 20, 11, 2, 11, 1, 8
Compute the arithmetic mean
The first group has 18 boys, whose mean height is 159 cm. The second group has 7 boys with a mean height of 150 cm. What is the mean height of all the boys from both groups?
Compute the weighted mean
Marks: 2, 3, 1. Their weights: 4, 1, 5.
Give the median of these data
In a survey, 39 students were asked how many brothers and sisters they have in total. The results: number of siblings 0: 7 students number of siblings 1: 9 students number of siblings 2: 7 students number of siblings 3: 2 students number of siblings 4: 6 students number of siblings 5: 8 students
Give the median
16, 26, 29, 24, 17
Compute the arithmetic mean
6, 15, 6, 5, 19, 30
Give the mode
7, 2, 20, 20, 10, 20, 20
Find x
The arithmetic mean of the numbers 1, 24, x, 26, 17, 3 is 13.5. What is x?
Compute the weighted mean
Marks: 1, 4, 6, 4. Their weights: 5, 3, 3, 5.
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