**Answer Activity 1**

**1.Null hypothesis: The average number of books that senior high school students read in a month is 10.
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Alternative hypothesis: The average number of books that senior high students read in a month is not 10.

**2.Null hypothesis: The mean working time of workers in the factory is 6 hours.
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**Alternative hypothesis: The mean working time of workers in the factory is not 6 hours.**

**Hope it helps you can do it**

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