Question

The state education commission wants to estimate the fraction of tenth grade students that have reading skills at or below the eighth grade level. Step 2 of 2: Suppose a sample of 2252 tenth graders is drawn. Of the students sampled, 495 read at or below the eighth grade level. Using the data, construct the 98% confidence interval for the population proportion of tenth graders reading at or below the eighth grade level. Round your answers to three decimal places.

Lower endpoint and upper endpoint??

Answer 1

Refer Standard normal table/Z-table or use excel function "=NORM.S.INV((1-0.01))" to find the Z-value.