Suppose heights of seasonal pine saplings are normally distributed and have a known population standard deviation of 17 millimeters and an unknown population mean. A random sample of 15 saplings is taken and gives a sample mean of 308 millimeters. Find the confidence interval for the population mean with a 99%z0.10 z0.05 z0.025 z0.01 z0.0051.282 1.645 1.960 2.326 2.576

Step-by-step explanation:

The confidence interval for the population mean x can be calculated as:

Where x' is the sample mean, s is the population standard deviation, n is the sample size and is the z-score that let a proportion of on the right tail.

is calculated as: 100%-99%=1%

So,

Finally, replacing the values of x' by 308, s by 17, n by 15 and by 2.576, we get that the confidence interval is:

for the points! : )

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step-by-step explanation: