Suppose a sample of 1042 tenth graders is drawn. Of the students sampled, 865 read above...

Suppose a sample of 1042 tenth graders is drawn. Of the students sampled, 865 read above the eighth grade level. Using the data, construct the 90% confidence interval for the population proportion of tenth graders reading at or below the eighth grade level. Round your answers to three decimal places.

I need help figuring out the formula for this problem.

Expert Solution

We have given,

x=1042-865=177
n=1042
Estimate for sample proportion=   0.1699
Level of significance is =1-0.90=0.1
Z critical value(using Z table)=1.645

Confidence interval formula is

=(0.151,0.189)

Lower limit for confidence interval=0.151

Upper limit for confidence interval=0.189

milcah answered 3 months ago

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