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One hundred teachers attended a seminar on mathematical problem solving. The attitudes of representative sample of 12 of the eachers were measured before and after the seminar. A positive number for change in attitude indicates that a teacher's attitude oward math became more positive. The twelve change scores are as follows. 3; 8; -1; 1; 0; 4; -3; 2; -1; 5; 4; -2 O Part (a) What is the mean change score? (Round your answer to two decimal places.) O Part (b) What is the standard deviation for this sample? (Round your answer to two decimal places.) O Part (c) What is the median change score? (Round your answer to one decimal place.) O Part (d) Find the change score that is 2.2 standard deviations below the mean. (Round your answer to one decimal place.)

One hundred teachers attended a seminar on mathematical problem solving. The attitudes of representative sample of 12 of the eachers were measured before and after the seminar. A positive number for change in attitude indicates that a teacher's attitude oward math became more positive. The twelve change scores are as follows. 3; 8; -1; 1; 0; 4; -3; 2; -1; 5; 4; -2 O Part (a) What is the mean change score? (Round your answer to two decimal places.) O Part (b) What is the standard deviation for this sample? (Round your answer to two decimal places.) O Part (c) What is the median change score? (Round your answer to one decimal place.) O Part (d) Find the change score that is 2.2 standard deviations below the mean. (Round your answer to one decimal place.)

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
Section10.1: Measures Of Center
Problem 13PPS
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One hundred teachers attended a seminar on mathematical problem solving. The attitudes of representative sample of 12 of the teachers were measured before and after the seminar. A positive number for change in attitude indicates that a teacher's attitude toward math became more positive. The twelve change scores are as follows. 3; 8; -1; 1; 0; 4; -3; 2; -1; 5; 4; -2 O Part (a) What is the mean change score? (Round your answer to two decimal places.) O Part (b) What is the standard deviation for this sample? (Round your answer to two decimal places.) O Part (c) What is the median change score? (Round your answer to one decimal place.) O Part (d) Find the change score that is 2.2 standard deviations below the mean. (Round your answer to one decimal place.)
Transcribed Image Text:One hundred teachers attended a seminar on mathematical problem solving. The attitudes of representative sample of 12 of the teachers were measured before and after the seminar. A positive number for change in attitude indicates that a teacher's attitude toward math became more positive. The twelve change scores are as follows. 3; 8; -1; 1; 0; 4; -3; 2; -1; 5; 4; -2 O Part (a) What is the mean change score? (Round your answer to two decimal places.) O Part (b) What is the standard deviation for this sample? (Round your answer to two decimal places.) O Part (c) What is the median change score? (Round your answer to one decimal place.) O Part (d) Find the change score that is 2.2 standard deviations below the mean. (Round your answer to one decimal place.)
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