Practice Interpretation (7) - Standard Deviation & Variance - IB 10 Mathematics

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9 questions

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3 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is the mean of the data set: {2, 4, 6, 8}?
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Add all numbers and divide by the count.
Question 2.
What does a variance of 0 signify?
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Think about the spread of data.
3Question 3.
What does a high standard deviation indicate?
- Data points are close together
- Data points are spread out
- There is no variability
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Think about the nature of variability.
4Question 4.
True or False: The square of the standard deviation is equal to the variance.
- True
- False
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Recall the definitions of both terms.
Question 5.
You have the following data set: {12, 15, 9, 20, 22}. Calculate the variance and the standard deviation.
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Remember the formulas for variance and take the √ to find SD.
Question 6.
Analyze the following data based on gender distribution in a classroom and calculate the standard deviation: Males: 5, 4, 3, 2. Females: 4, 5, 6, 7.
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Understand how to treat separate groups carefully.

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