A teacher wishes to see whether a new smartphone app will reduce the number of grammatical errors when writing essay. She randomly selected six students, and the data are shown in the table below. Student A B C E F G Before using App 12 9 0 5 3 4 After using App 9 6 1 3 3 2 At a = 0.025, can it be concluded that the number of errors has been reduced?

A teacher wishes to see whether a new smartphone app will reduce the number of grammatical errors when writing essay. She randomly selected six students, and the data are shown in the table below. Student A B C E F G Before using App 12 9 0 5 3 4 After using App 9 6 1 3 3 2 At a = 0.025, can it be concluded that the number of errors has been reduced?

Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015

1st Edition

ISBN:9781680331141

Author:HOUGHTON MIFFLIN HARCOURT

Publisher:HOUGHTON MIFFLIN HARCOURT

Chapter11: Data Analysis And Displays

Section11.4: Two-ways Tables

Problem 8E

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C. A teacher wishes to see whether a new smartphone app will reduce the number of grammatical errors when writing essay. She randomly selected six students, and the data are shown in the table below. Student A B C E F G Before using App 12 9 0 5 3 4 After using App 9 6 1 3 3 2 At a = 0.025, can it be concluded that the number of errors has been reduced?

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