Practice Mean (average) (3.1) - Standard Deviation & Variance - IB 10 Mathematics

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9 questions

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Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
Calculate the mean of the following data set: 4, 5, 6.
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Add all numbers together and divide by the count.
Question 2.
Find the mean of these temperatures: 15, 20, 25.
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Use the same method: sum and divide.
3Question 3.
What is the formula for calculating the mean?
- Mean = sum/n
- Mean = n/sum
- Mean = sum × n
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Remember the structure of the formula.
4Question 4.
True or False: The mean is always the value that occurs most frequently in a data set.
- True
- False
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Think about definitions of different averages.
Question 5.
A dataset has 100 values, all at 50. What is the mean? Now, if one value is changed to 100, what would the new mean be?
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Carefully add up the total value before recalculating.
Question 6.
If the scores of five students are 70, 80, 90, 100, and x, and their average is 85, find the value of x.
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Set up an equation to find x.

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