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In: Statistics and Probability

A newspaper article summarized data from a survey of 1,260 pet owners. The article indicated that...

A newspaper article summarized data from a survey of 1,260 pet owners. The article indicated that 72% of the pet owners celebrated their pet's birthday during the previous year. Assume that the sample is representative of the population of pet owners in the United States.

(a)

Use the given information to estimate the proportion of pet owners who have celebrated their pet's birthday in the past year using a 90% confidence interval. (Round your answers to three decimal places.)

  ,  

Solutions

Expert Solution

We have given,              
              
  
n=1260          
Estimate for sample proportion=0.72  
Level of significance is =1-0.90=0.1      
Z critical value(using Z table)=1.645      
              
Confidence interval formula is              


=(0.699,0.741)
          
Lower limit for confidence interval=0.699  
              
Upper limit for confidence interval=0.741

orchestra answered 2 years ago
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