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The lengths of text messages are normally distributed with a population standard deviation of 6 characters and an unknown population mean. If a random sample
The lengths of text messages are normally distributed with a population standard deviation of 6 characters and an unknown population mean. If a random sample of 23 text messages is taken and results in a sample mean of 25 characters, find a 92% confidence interval for the population mean. Round your answers to two decimal places.
z0.10 | z0.05 | z0.04 | z0.025 | z0.01 | z0.005 |
---|---|---|---|---|---|
1.282 | 1.645 | 1.751 | 1.960 | 2.326 | 2.576 |
You may use a calculator or the common z-values above.
Select the correct answer below:
A. (22.81,27.19)
B. (22.94,27.06)
C. (21.78,28.22)
D. (22.09,27.91)
E. (22.55,27.45)
F. (23.40,26.60)
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