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A tutor promises to improve GMAT scores of students by more than 56 points after three lessons. To see if this is true, the tutor takes a sample of 49 students' test scores after and before they received tutoring. The mean difference was 59 points better after tutoring, with a standard deviation of the differences equal to 14 points. Let un denote the mean of the difference: score after tutoring minus score before tutoring. Which of the following is the correct value of the test statistic? Multiple Cholce Z = 1.4643 z = 1.500e t48 = 1.4643 t48 = 1.500e

A tutor promises to improve GMAT scores of students by more than 56 points after three lessons. To see if this is true, the tutor takes a sample of 49 students' test scores after and before they received tutoring. The mean difference was 59 points better after tutoring, with a standard deviation of the differences equal to 14 points. Let un denote the mean of the difference: score after tutoring minus score before tutoring. Which of the following is the correct value of the test statistic? Multiple Cholce Z = 1.4643 z = 1.500e t48 = 1.4643 t48 = 1.500e

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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A tutor promises to improve GMAT scores of students by more than 56 points after three lessons. To see if this is true, the tutor takes a sample of 49 students' test scores after and before they received tutoring. The mean difference was 59 points better after tutoring, with a standard deviation of the differences equal to 14 points. Let μD denote the mean of the difference: score after tutoring minus score before tutoring. Which of the following is the correct value of the test statistic? **Multiple Choice:** - ○ \( z = 1.4643 \) - ○ \( z = 1.5000 \) - ○ \( t_{48} = 1.4643 \) - ○ \( t_{48} = 1.5000 \)
Transcribed Image Text:A tutor promises to improve GMAT scores of students by more than 56 points after three lessons. To see if this is true, the tutor takes a sample of 49 students' test scores after and before they received tutoring. The mean difference was 59 points better after tutoring, with a standard deviation of the differences equal to 14 points. Let μD denote the mean of the difference: score after tutoring minus score before tutoring. Which of the following is the correct value of the test statistic? **Multiple Choice:** - ○ \( z = 1.4643 \) - ○ \( z = 1.5000 \) - ○ \( t_{48} = 1.4643 \) - ○ \( t_{48} = 1.5000 \)
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