Math Problem Statement
Solution
To find the probability , we need to use the standard normal distribution.
Given:
- The thermometer readings are normally distributed with a mean and a standard deviation .
- We are looking for .
Since represents the standard normal variable, we can directly use the z-score value of to look up the cumulative probability in the standard normal distribution table or use a calculator.
- Using the standard normal distribution table or a calculator:
For :
- The cumulative probability .
Therefore:
This means there is approximately a 46.3% chance of obtaining a reading less than .
Would you like more details on how to interpret this probability?
Here are 5 related questions that could deepen your understanding:
- How would the probability change if the reading threshold was different, say or ?
- What is the probability of obtaining a reading between two values, for example, between and ?
- How would this problem change if the standard deviation was 0.5 instead of 1.0?
- What is the probability of obtaining a reading greater than ?
- Can you explain why the normal distribution is appropriate for this type of problem?
Tip: When interpreting probabilities in a standard normal distribution, values close to 0.5 mean the value is near the mean, while probabilities closer to 0 or 1 indicate values far from the mean in the respective directions.
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Math Problem Analysis
Mathematical Concepts
Probability
Normal Distribution
Standard Normal Distribution
Z-scores
Formulas
Z = (X - μ) / σ
Theorems
68-95-99.7 rule (Empirical Rule)
Properties of Standard Normal Distribution
Suitable Grade Level
Grades 10-12
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