Practice Introduction (2) - Standard Deviation & Variance - IB 10 Mathematics

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8 questions

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Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
2 questions · about 1 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is the formula for calculating the mean?
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Think about the average of a set of numbers.
Question 2.
What does a standard deviation of zero imply?
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Consider what it means for data points to be the same.
3Question 3.
What does variance measure?
- A. Average data value
- B. Dispersion of data
- C. Total data sum
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Think about why we care about how spread out a dataset is.
4Question 4.
Is standard deviation always a positive number?
- True
- False
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Consider how the standard deviation is calculated.
Question 5.
Given the test scores of five students: 65, 70, 75, 80, and 85, calculate the variance and standard deviation.
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Use the formula for variance with these scores after finding the mean.
Question 6.
A dataset has the following ages: 10, 20, 30, 40, 50. Calculate the population variance and standard deviation.
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Remember to use N for population calculations.

4 more questions in this section. Enroll free to practise them all.