I’m another normally distributed test score is 80 and the standard deviations is 10. How common are values in the less than 60?
1 answer:
Answer:
<em>The probability of obtaining a score less than 60 is 2.28% </em>
<em>It happens 2 out of 100 times.</em>
Step-by-step explanation:
If the mean μ = 80 and the standard deviation σ = 10, then we need to find the probability that an X value is less than 60.
Then we find
To find this probability we use the Z statistic.
This is the same as
We look for this value in the table for the normal distribution of right queue and we have:
<em>The probability of obtaining a score less than 60 is 2.28% </em>
<em>It happens 2 out of 100 times.</em>
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We need to find the slope. To find the slope we can use the following formula:
Use the points <span>(-5, 6) and (0, 1) and plug it into our slope formula and solve:
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