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Suppose germination periods, in days, for grass seed are normally distributed and have a known population standard deviation of 5 days and an unknown population
Suppose germination periods, in days, for grass seed are normally distributed and have a known population standard deviation of 5 days and an unknown population mean. A random sample of 19 types of grass seed is taken and gives a sample mean of 36 days.
Find the confidence interval for the population mean with a 99% confidence level.
z0.10z0.10 | z0.05z0.05 | z0.025z0.025 | z0.01z0.01 | z0.005z0.005 |
---|---|---|---|---|
1.282 | 1.645 | 1.960 | 2.326 | 2.576 |
You may use a calculator or the common z values above.
- Round the final answer to twodecimal places.
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