Practice Two-sided Probability (5.3) - Normal Distribution - IB 10 Mathematics

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9 questions

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

Question 1.
What is two-sided probability?
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Think about both sides of the mean.
Question 2.
How do you calculate Z-score?
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Z-score tells you how far and in what direction a point is from the mean.
3Question 3.
What does two-sided probability measure?
- Only values above the mean
- Values within a certain range around the mean
- Total probabilities of values
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Focus on the range aspect.
4Question 4.
True or False: The empirical rule states that 95% of values lie within two standard deviations of the mean.
- True
- False
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Recall the empirical rule percentages.
Question 5.
You are testing a new teaching method, and the test scores are normally distributed with μ = 75 and σ = 10. Calculate the two-sided probability for scores between 70 and 80.
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Don't forget to reference the Z-table for probabilities.
Question 6.
An IQ test is normally distributed with μ = 100 and σ = 15. Find the probability of scoring between 85 and 115.
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Refer to the empirical rule to check your work.

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