The publication manager of a daily newspaper wishes to develop guaranteed circulation figures for use in...
The publication manager of a daily newspaper wishes to develop guaranteed circulation figures for use in soliciting adverising. The number of copies sold each day is normally distributed. A sample of 25 days yielded a sample mean of 556,000 copies. Assume that the population standard deviation is 8,000 copies. What is the 95% confidence interval for the average number of copies sold each day?
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from 556,000.3 to 559,136.6 |
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|
from 552,864.0 to 559,136.0 |
||
|
from 552,687.6 to 559,302.4 |
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3,136.0 |
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The publication manager of a daily newspaper wishes to develop
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