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In the past, when elementary school children in a large city were screened, 21% were found to have auditory defects. In a recent study of 100 children in the city who had been screened within the past month, 34 were found to have such defects. Do these data suggest a significant increase in the proportion of children having auditory defects? Test at a = 0.01. Round your answers to three decimal places, and round any interim calculations to four decimal places. What is the test statistic? Hint: Make sure you are using the correct value for the standard error.

In the past, when elementary school children in a large city were screened, 21% were found to have auditory defects. In a recent study of 100 children in the city who had been screened within the past month, 34 were found to have such defects. Do these data suggest a significant increase in the proportion of children having auditory defects? Test at a = 0.01. Round your answers to three decimal places, and round any interim calculations to four decimal places. What is the test statistic? Hint: Make sure you are using the correct value for the standard error.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 42PFA
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In the past, when elementary school children in a large city were screened, 21% were found to have auditory defects. In a recent study of 100 children in the city who had been screened within the past month, 34 were found to have such defects. Do these data suggest a significant increase in the proportion of children having auditory defects? Test at a = 0.01. Round your answers to three decimal places, and round any interim calculations to four decimal places. What is the test statistic? Hint: Make sure you are using the correct value for the standard error.
Transcribed Image Text:In the past, when elementary school children in a large city were screened, 21% were found to have auditory defects. In a recent study of 100 children in the city who had been screened within the past month, 34 were found to have such defects. Do these data suggest a significant increase in the proportion of children having auditory defects? Test at a = 0.01. Round your answers to three decimal places, and round any interim calculations to four decimal places. What is the test statistic? Hint: Make sure you are using the correct value for the standard error.
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