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squirrelH (squirrel) 于 (Wed Mar 11 02:42:41 2009) 提到:
先感谢您的回答，我实在是很confuse。。。。
问题是：
The goal of your marketing campaign is for more than 25% of supermarket
shoppers to recognize your brand name. A recent survey of 150 random
shoppers found that 47 of them recognized your brand name.
我现在想测：
Ho: brand awareness > 25%
Ha: brand awareness ≤ 25%
Brand awareness from survey = 47/150 = 31.3%
Expected brand awareness = 25%
Population standard deviation = √(25
