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Adult entrance fees to amusement parks in the United Statesare normally distributed with a population standard deviation of2.5 dollars and an unknown population mean. A
Adult entrance fees to amusement parks in the United Statesare normally distributed with a population standard deviation of2.5
dollars and an unknown population mean. A random sample of22
entrance fees at different amusement parks is taken and results in a sample mean of61
dollars.
Find themargin of errorfor a99%
confidence interval for the population mean.
z
0.10
z
0.10
z
0.05
z
0.05
z
0.025
z
0.025
z
0.01
z
0.01
z
0.005
z
0.005
1.282
1.645
1.960
2.326
2.576
You may use a calculator or the commonz
values above.
- Round the final answer to twodecimal places.
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