Question

Asked Mar 13, 2019

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Step 1

**Empirical rule:**

For symmetric or normal distributions,

- 68% of values fall within one standard deviation from the mean. That is, (m – s, m + s).
- 95% of values fall within two standard deviations from the mean. That is, (m – 2*s, m + 2*s).
- 7% of values fall within three standard deviations from the mean. That is, (m – 3*s, m + 3*s).

Step 2

**Calculations:**

The random variable *x *follows normal distribution with mean 50 and standard deviation 5.

That is, m = 50 and s = 5.

The calculation based on empirical rule is given below:

Step 3

**Obtain the correct option:**

From the given 5 options, option (B) states that 95% of the s...

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