Question

In: Statistics and Probability

​Claim: Fewer than 95​% of adults have a cell phone. In a reputable poll of 1234...

​Claim: Fewer than

95​% of adults have a cell phone. In a reputable poll of 1234 ​adults, 90​% said that they have a cell phone. Find the value of the test statistic.

Solutions

Expert Solution

We have for given example,              
Population proportion value is =0.95          
  
              
n=1234          
          
Estimate for sample proportion =0.9          
              
Z test statistic formula for proportion              


=-8.06      

orchestra answered 2 years ago
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