Posted by **Tracey** on Tuesday, June 5, 2012 at 9:41am.

Suppose X has a mound-shaped distribution with sigma=9. A random sample of size 36 has a sample mean 20. Is it appropriate to use a normal distribution to compute a confidence interval for the population mean u?

- statistics -
**PsyDAG**, Tuesday, June 5, 2012 at 10:49am
As long as the mound approximates a normal distribution, yes.

- statistics -
**Stephanie**, Monday, October 27, 2014 at 12:29pm
Yes, when the sample size is larger than 30, you assume a normal distribution instead of using the student's t distribution.

## Answer this Question

## Related Questions

- Statistics - Suppose x has a mound-shaped distribution with sigma = 9 . A random...
- Bcc - suppose x has a mound-shaped distribution. A random sample size 16 has a ...
- Bcc - suppose x has a mound-shaped distribution with sigma=3. Find the minimal...
- statistics - Statistical Abstracts (117th edition) reports sale price of ...
- STATISTICS HELP!!!!!!! - Statistical Abstracts (117th edition) reports sale ...
- College statistics - Statistical Abstracts (117th edition) reports sale price ...
- statistics - Suppose we take a random sample of size n from a normal population ...
- Statistics and Probability - Suppose you took 1000 random samples of size 200 ...
- Statistics and Probability - Suppose you took 1000 random samples of size 200 ...
- statistics - Use the given confidence level and sample data to find a confidence...