Pregunta
is a normally distributed random variable with mean 36 and standard deviation 20 .
What is the probability that
is between 16 and 96 ?
Use the
rule and write your answer as a decimal. Round to the nearest
thousandth if necessary.
What is the probability that
Use the
thousandth if necessary.
Ask by Daniel Todd. in the United States
Jan 24,2025
Solución de inteligencia artificial de Upstudy
Respuesta verificada por el tutor
Responder
The probability that
is between 16 and 96 is 0.95.
Solución

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Como
The Deep Dive
To find the probability that
is between 16 and 96, we first need to consider the mean and standard deviation of the distribution. The mean (μ) is 36, and the standard deviation (σ) is 20.
Now, we can determine how many standard deviations 16 and 96 are from the mean:
-
For 16:
-
For 96:
Using the
rule for normal distributions, we can assess probabilities based on these z-scores:
- The probability that
is within 1 standard deviation of the mean (from to , or 16 to 56) is approximately 68%. - The probability that
is within 3 standard deviations (from to , or -24 to 96) is approximately 99.7%.
Since we want the probability of
being between 16 and 96, we can combine these two ranges:
- From 16 to 56 gives us 68%.
- From 56 to 96 adds the area from 56 to 96, which is half of the remaining area outside of -1 to 3, about 31.7% (half of (99.7% - 68%)).
Thus:
Converting this to a decimal gives approximately
.
So, the final answer rounded to the nearest thousandth is:

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