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In: Statistics and Probability

random samples of 400 bottles of hairspray are distributed in the grocery store. Of the bottles,...

random samples of 400 bottles of hairspray are distributed in the grocery store. Of the bottles, 300 have a cash prize inside the cap. Which of the following is a 90% confidence interval for the true proportion of bottles that have the cash prize at the grocery store?

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Expert Solution

We have given here,                              
                              
x=300                          
n=400                          
Estimate for sample proportion                              

Level of significance is =1-0.90=0.1                      
Z critical value(using Z table)=1.645      

               

orchestra answered 1 year ago
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