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You want to know the average weight of all babies born this year

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You want to know the average weight of all babies born this year. You collect some data on weights of babies born this year. What tool would be help you find this? Choose the one best answer.

 

1 sample z test

 

1 sample z interval

 

1 sample t test

 

1 sample t interval

 

1 proportion test

 

1 proportion interval