IQ is known to be normally distributed with a mean of 100 and standard deviation of 16.  A small school of 79 students has a mean IQ of 97. With an alpha level of 0.05, what is the appropriate test statistic and what is its (two-tailed) critical value to test if the school is representative of the general population?       t; ±1       z; ±1.96       z; ±1       t; ±2.58

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  1. IQ is known to be normally distributed with a mean of 100 and standard deviation of 16.  A small school of 79 students has a mean IQ of 97. With an alpha level of 0.05, what is the appropriate test statistic and what is its (two-tailed) critical value to test if the school is representative of the general population?

     

       

    t; ±1

     

       

    z; ±1.96

     

       

    z; ±1

     

       

    t; ±2.58

     

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