Posted by **HM** on Friday, November 25, 2011 at 3:40pm.

Assume that a normal distribution has a mean of 21 and a standard deviation of 2.

Use the empirical rule to find the percentage of values that lie above 23.

Now I did this on the Ti 83 by using Normalcdf(-5,1) and getting an answer of 0.84 and then 1-0.84 and I get about 15.9 in percentage but it is showing me wrong.

Help me I am confused.

Where am I going wrong?

## Answer This Question

## Related Questions

- Statistics - Hi! I've been stuck on this question for a while. I know that I ...
- MATH - Which of the following normal distributions has the smallest spread? A. A...
- Statistics - 1. Which of the following statements are correct? a. A normal ...
- college - 1. Which of the following statements are correct? a. A normal ...
- statistics - 2. Why is it important to know the mean and standard deviation for ...
- statistics - Given a distribution with mean X and standard deviation S, answer ...
- math - Suppose x is a random variable with mean and standard deviation. If a ...
- Math (Statistic) - Considered the sampling distribution of a sample mean ...
- Statistics - Suppose that IQ scores have a bell-shaped distribution with a mean ...
- Math-confused...plz help - I. Use Chebyshev’s theorem to find what percent of ...

More Related Questions