Assume that a normal distribution has a mean of 21 and a standard deviation of 2. What is the percentage of values that lie above 23?
Use the empirical rule.
Use the empirical rule.
1 Answer
Explanation:
The question asks us to apply the empirical rule for normal distributions which states that
We are looking for the percentage of the population above
The empirical rule tells us that
Therefore,
Check:
We can use the following diagram of a normal curve to check our answer:
All we need to do is add up the percentages of the population above the
Therefore our answer makes sense.