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Soloha48 [4]
2 years ago
12

If a distribution has a mean of 100 and a standard deviation of 15, what value would be 2 standard deviations from the mean

Mathematics
1 answer:
sveticcg [70]2 years ago
4 0

The value that is 2 standard deviations from the mean is; 130

<h3>What is Empirical Rule?</h3>

For this question, we will use Z-score and as such whether the value is below or above mean (shown by positive or negative sign) and by how much (times the standard deviation).

Thus;

Calculated value = μ + zσ

where;

μ is mean

σ is standard deviation

Hence, the value that would be +2 standard deviations from the mean is;

Calculated value = 100 + 2(15)

Calculated value = 130

Read more about Empirical Rule at; brainly.com/question/10093236

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Answer:

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Step-by-step explanation:

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The probability of a light being red is not affected by the colour of the previous light, so at each of the 3 lights, the probability of red is always 60%.

To find the probability that all three lights will be red, multiply the three probabilities together. (Convert them to decimals first).

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